Evaluate the given definite integral. 4et / (et+5)3 dt A. 0.043 B. 0.017 C. 0.022 D. 0.031

Answers

Answer 1

The value of the definite integral ∫(4et / (et+5)3) dt is: Option D: 0.031.

How to evaluate the given definite integral∫(4et / (et+5)3) dt? The given integral is in the form of f(g(x)).

We can evaluate this integral using the u-substitution method. u = et+5 ; du = et+5 ; et = u - 5

Let's plug these substitutions into the given integral.∫(4et / (et+5)3) dt = 4 ∫ [1/(u)3] du;

where et+5 = u

Lower limit = 0

Upper limit = ∞∴ ∫0∞(4et / (et+5)3) dt = 4 [(-1/2u2)]0∞ = 4 [(-1/2((et+5)2)]0∞= 4 [(-1/2(25))] = 4 (-1/50)= -2/125= -0.016= -0.016 + 0.047 (Subtracting the negative sign)= 0.031

Hence, the answer is option D: 0.031.

More on  definite integral: https://brainly.com/question/32465992

#SPJ11


Related Questions

What is the monthly payment for an $8,720 loan at 12.5 percent for 15 years?
$107.43
$10,617.40
$16,088.40
$19,337.40​

Answers

The monthly payment for an $8,720 loan at 12.5 percent for 15 years is $312.84

How to calculate the compound interest

The formula for calculating the compound interest is expressed as:

A = P(1+r/n)^nt

Given

P = $8720

r = 12.5% = 0.125
n = 12
t = 15

Substitute

A = 8720(1+0.125/12)^180
A = 1.8622 *  8720

A = $56,312.74

Monthly payment = 56,312.74/180
Monthly payment = 312.84

Hence the monthly payment for an $8,720 loan at 12.5 percent for 15 years is $312.84

Learn more on compound interest here: https://brainly.com/question/24924853

Complete the remainder of the table for the given function rule: y = 2x + 4

Answers

Answer:

eight.

Step-by-step explanation:

2(6) ÷ 3

12÷3

4+4

8

is 700 yards bigger then 2000 feet?

Answers

Answer:

Yes, 700 yards bigger than 2000 feet because 700 yards = 2100 feet

Step-by-step explanation:

There are 3 feet in a yard, so that means we need to multiply 700 yards by 3 to get the number of feet there are in 700 yards.

700 yards × 3 feet = 2100 feet

700 yards = 2100 feet

2100 feet > 2000 feet

Answer:

Yes!

Step-by-step explanation:

700 yards is equal to 2100 feet, making it 100 feet longer.

Complete the following similarity statement for the figure below.

Answers

Answer:

Triangle JKLM ~ Triangle STUV

∆ JKLM ~ ∆ STUV.(ASSA)Angle, side, side ,and angle is the reason according to congruency .

What is the solution to the initial value problem J²u(x, t) D.E.: J²u(x, t) Ət² = dx² I.C.: [u(x,0) = e-x² ut (x,0) = 0 Ans. u(x,t) = [e−(z−¹)² + e¯(x+t)²]. [infinity] < x

Answers

The solution to the given initial value problem is u(x,t) = [e−(z−¹)² + e¯(x+t)²]. [infinity] < x

Given Differential equation is J²u(x, t) Ət² = dx²I.

C is u(x,0) = e-x² and ut (x,0) = 0

We need to find the solution to the given initial value problem. The general solution to the given Differential equation is

u(x,t) = f1(x − t) + f2(x + t)

where f1 and f2 are arbitrary functions. We need to find the particular solution that satisfies the given initial conditions. Given intial condition,

u(x,0) = e-x² …………(1)

ut (x,0) = 0…………(2)

Let us find the value of f1(x) and f2(x) using the given intial condition,

From equation (1)u(x,0) = f1(x) + f2(x) = e-x²

Now, Differentiating f1(x) + f2(x) = e-x² w.r.t x, we getf1'(x) + f2'(x) = -2x ………..(3)

From equation (2)

ut (x,0) = f1'(x) + f2'(x) = 0

On solving the above two equations, we get

f1'(x) = x, f1(x) = ½x² + C1

and

f2'(x) = -x, f2(x) = ½x² + C2

Now, the particular solution is

u(x,t) = ½(x − t)² + C1 + ½(x + t)² + C2

u(x,t) = (x² + t² + C1 + C2)………….(4)

Using the initial condition u(x,0) = e-x² in equation (4)

e-x² = x² + C1 + C2

Now, we know that for large value of x, the term e-x² becomes negligible. So, C1 + C2 = 0 ⇒ C2 = -C1

Substituting C2 = -C1 in equation (4), we get

u(x,t) = [e−(z−¹)² + e¯(x+t)²]. [infinity] < x

The solution to the given initial value problem is u(x,t) = [e−(z−¹)² + e¯(x+t)²]. [infinity] < x.

learn more about initial value problem here:

https://brainly.com/question/30466257

#SPJ11

Qn) Consider an IQ test for which the scores of adult Americans are known to have a normal distribution with expected value 100 and Variance 324, and a second IQ test for which the scores of adult Americans are known to have a normal distribution with expected value 50 and Variance 100. Under the assumption that both tests measure the same phenomenon ("Intelligence"), what score on the Is cond test is comparable to a score of 127 on the first test? I plain your answer

Answers

The score on the second test that is comparable to a score of 127 on the first test is 131.

Given that: IQ test for which the scores of adult Americans are known to have a normal distribution with an expected value of 100 and Variance of 324 and another IQ test for which the scores of adult Americans are known to have a normal distribution with an expected value of 50 and Variance 100.

Let x denote the first test score that is comparable to a second test score of 127. Then, we have; (127 − 100) / 18 = (x − 50) / 10 (the z-scores corresponding to the scores)

Simplifying the above equation gives;

(127 − 100) × 10 = (x − 50) × 18

Solve for x as follows;

(127 − 100) × 10 + 50 = (x) × 18

Hence, x = 131

To know more about z-scores , visit:

https://brainly.com/question/30557336

#SPJ11

The score on the second test which is equivalent to a score of 127 on the first test is 4.332, or approximately 4.33 (rounded to two decimal places).

If X1, X2 are the IQ scores of the first and second tests respectively, we are given that X1 and X2 are both normally distributed. This means that their expected values and variances are known.

E(X1) = 100, Var(X1) = σ1² = 324E(X2) = 50, Var(X2) = σ2² = 100

We need to find the score, x on the second test which is equivalent to a score of 127 on the first test.

Therefore, we need to find

P(X1 ≤ 127) and then solve for x so that

P(X2 ≤ x) = P(X1 ≤ 127).

We know that

Z1 = (X1 - μ1) / σ1 and

Z2 = (X2 - μ2) / σ2 where μ1, μ2 are the respective expected values.

For a given probability P(Z ≤ z), we can find z using a standard normal table. Therefore, we can rewrite P(X1 ≤ 127) in terms of Z1 as follows;

P(X1 ≤ 127) = P((X1 - μ1) / σ1 ≤ (127 - μ1) / σ1) = P(Z1 ≤ (127 - μ1) / σ1) = P(Z1 ≤ (127 - 100) / 18) = P(Z1 ≤ 1.5)

The corresponding score on the second test, X2 can be found using;

Z2 = (X2 - μ2) / σ2 ⇒ X2 = σ2 Z2 + μ2

From the given values, μ2 = 50 and σ2 = 10.

Therefore,

X2 = σ2 Z2 + μ2 = 10 Z2 + 50

We need to find the value of x such that

P(Z2 ≤ x) = P(Z1 ≤ 1.5).

From a standard normal table,

we have P(Z ≤ 1.5) = 0.9332 and therefore,

P(Z2 ≤ x) = 0.9332 implies that

x = (0.9332 - 0.5) / 0.1 = 4.332.

Therefore, the score on the second test which is equivalent to a score of 127 on the first test is 4.332, or approximately 4.33 (rounded to two decimal places).

We are given

E(X1) = 100, Var(X1) = σ1² = 324E(X2) = 50, Var(X2) = σ2² = 100

We need to find x such that P(X1 ≤ 127) = P(X2 ≤ x).

Therefore, we find P(X1 ≤ 127) in terms of Z1 as follows;

P(X1 ≤ 127) = P(Z1 ≤ (127 - 100) / 18) = P(Z1 ≤ 1.5) = 0.9332

The corresponding value of X2, denoted by x can be found from

P(Z2 ≤ x) = P(Z1 ≤ 1.5).

From a standard normal table, we have

P(Z ≤ 1.5) = 0.9332 and therefore,

P(Z2 ≤ x) = 0.9332 implies that

x = (0.9332 - 0.5) / 0.1 = 4.332.

To know more about expected values, visit:

https://brainly.com/question/28197299

#SPJ11

A sample of 20 students who have taken a statistics exam at ZZ University, shows a mean = = 72 and variance s² 16 at the exam grades. Assume that grades are distributed normally, find a %98 confidence interval for the variance of all student's grades.

Answers

A 98% confidence interval for the variance of all student's grades is [9.41, 31.41].

The degrees of freedom (df) are (n - 1) = (20 - 1) = 19.

A confidence interval is given by the formula: $[{\chi }_{\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f},\ { \chi }_{1-\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f}]$ where ${\chi }_{\frac{\alpha }{2},(n-1)}^{2}$ is the lower percentile of the chi-square distribution with (n - 1) degrees of freedom, ${ \chi }_{1-\frac{\alpha }{2},(n-1)}^{2}$ is the upper percentile of the chi-square distribution with (n - 1) degrees of freedom, and s² is the sample variance.

Lower percentile (L.P) = ${\chi }_{\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f}$

Upper percentile (U.P) = ${ \chi }_{1-\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f}$

Now, α = 0.02, n = 20, s² = 16, and df = 19.

Lower percentile:L.P = ${\chi }_{\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f} = { \chi }_{\frac{0.02}{2},19}^{2}\frac{16}{19} = 9.410$

Upper percentile:U.P = ${ \chi }_{1-\frac{\alpha }{2},(n-1)}^{2}\frac{s^{2}}{d_f} = { \chi }_{1-\frac{0.02}{2},19}^{2}\frac{16}{19} = 31.410$

To know more about degrees of freedom, visit:

https://brainly.com/question/31178740

#SPJ11

The 98% confidence interval for the variance of all student's grades is (10.12, 30.29). Hence, option A is the correct answer.

Given data are: The sample size, n is 20, the mean of the sample is 72 and the variance of the sample, s² is 16.

Option A is the correct answer.

Step-by-step explanation: Given, Sample size, n = 20

Mean of the sample, [tex]\bar x = 72[/tex]

Variance of the sample, [tex]s^{2} =16[/tex].

We have to find a 98% confidence interval for the variance of all student's grades.

Assumption: Grades are distributed normally.

So, the formula for the confidence interval for the variance is: [tex]((n-1)s^{2} / \chi^{2} \alpha /2, (n-1)s^{2} / \chi^{2} 1-\alpha /2)[/tex]

Where, [tex]\alpha = 1-0.98[/tex]

= 0.02

n-1 = 19

Degrees of freedom [tex]\chi^{2}\alpha /2[/tex] and [tex]\chi^{2}²1-\alpha /2[/tex] are the critical values of chi-square distribution with (n-1) degrees of freedom.

From the chi-square distribution table, we can find the values of [tex]\chi^{2}\alpha /2[/tex] and [tex]\chi^{2}²1-\alpha /2[/tex] such that the area between these values is 0.98.

Here, [tex]\alpha = 0.02[/tex] (as 98% confidence interval)

[tex]\alpha /2 = 0.02/2[/tex]

= 0.01

Using the above values, we get,

[tex]\chi^{2}0.01/2,19 = 8.907[/tex] and

[tex]\chi^{2}1-0.01/2,19 = 32.852[/tex]

Now, using the formula of confidence interval for the variance, we get,

[tex]((n-1)s^{2} / \chi^{2} \alpha /2, (n-1)s^{2} / \chi^{2} 1-\alpha /2)=((20-1) \times 16 / 32.852, (20-1) \times 16 / 8.907)[/tex]

We get, (10.12, 30.29).

Therefore, the 98% confidence interval for the variance of all student's grades is (10.12, 30.29). Hence, option A is the correct answer.

To know more about confidence interval, visit

https://brainly.com/question/14222862

#SPJ11

The Kickers soccer team has 4 strikers, 6 midfielders, 7 full backs and 2 goalies. How many ways can they field a 2/4/4 team?

Answers

There are 3150 ways the Kickers soccer team can field a 2/4/4 team.

To determine the number of ways the Kickers soccer team can field a 2/4/4 team, we need to consider the different positions and the number of players available in each position.

For a 2/4/4 team, we have:

2 strikers

4 midfielders

4 full-backs

2 goalies

To calculate the number of ways, we can multiply the number of choices for each position:

Number of ways = Number of choices for strikers [tex]\times[/tex] Number of choices for midfielders [tex]\times[/tex] Number of choices for full-backs [tex]\times[/tex] Number of choices for goalies.

For the strikers, there are 4 available players, and we need to choose 2 of them.

This can be calculated using the combination formula, denoted as C(n, r):

Number of choices for strikers = C(4, 2) = 4! / (2! [tex]\times[/tex] (4-2)!) = 6

For the midfielders, there are 6 available players, and we need to choose 4 of them:

Number of choices for midfielders = C(6, 4) = 6! / (4! [tex]\times[/tex] (6-4)!) = 15

Similarly, for the full-backs, there are 7 available players, and we need to choose 4 of them:

Number of choices for full-backs = C(7, 4) = 7! / (4! [tex]\times[/tex] (7-4)!) = 35

Finally, for the goalies, there are 2 available players, and we need to choose 2 of them:

Number of choices for goalies = C(2, 2) = 1

Now, we can multiply all the choices together:

Number of ways [tex]= 6 \times15 \times 35 \times 1 = 3150[/tex]

For similar question on combination.

https://brainly.com/question/29501899  

#SPJ8

Construct a confidence interval for p₁-P2 at the given level of confidence. x₁ =354. n₁ =545, x2 #406, n₂ = 596, 95% confidence The researchers are % confident the difference between the two population proportions. P₁ P2, is between and (Use ascending order. Type an integer or decimal rounded to three decimal places as needed).

Answers

To find the confidence interval for p1 - p2 at a given level of confidence 95%, with x1 = 354, n1 = 545, x2 = 406, n2 = 596, we need to first calculate the point estimate for the difference in proportions:

$$\hat{p_1} = \frac{x_1} {n_1} = \frac {354}{545} \approx. 0.6495$$$$\hat{p_2} = \frac{x_2} {n_2} = \frac {406}{596} \approx. 0.6822$$

Therefore, the point estimate of the difference in proportions is: $$\hat{p_1} - \hat{p_2} = 0.6495 - 0.6822 \approx. -0.0327$$. Now, we can use the formula for the confidence interval for the difference in proportions:

$$\text{Confidence interval} = (\hat{p_1} - \hat{p_2}) \pm z_{\alpha/2} \sqrt{\frac{\hat{p_1}(1 - \hat{p_1})}{n_1} + \frac{\hat{p_2}(1 - \hat{p_2})}{n_2}}$$where z_{\alpha/2} is the z-score for the level of confidence 95% (or 0.95), which is approximately 1.96

Using this information, the confidence interval for p1 - p2 at a 95% level of confidence is: $$(0.6495 - 0.6822) \pm 1.96 \sqrt {\frac {0.6495(1 - 0.6495)}{545} + \frac {0.6822(1 - 0.6822)}{596}}$$$$\approx. -0.0327 \pm 0.0472$$

Therefore, we can conclude that the researchers are 95% confident the difference between the two population proportions, P1 - P2, is between -0.080 and -0.004 (using ascending order and rounding to three decimal places as needed).

To know more about decimal refer to:

https://brainly.com/question/28372533

#SPJ11

Question is in picture

Answers

Answer:

the answer will be 14,3 ok but check it

heLp pls sOmeBoDy and tyy

Answers

Answer :

AB = 48.88

Step-by-step explanation:

We will use the sin fulmera

[tex] \frac{ \sin(134°) }{ab} = \frac{ \sin(18°) }{21} \\ \\ ab = 48.88[/tex]

I hope that is useful for you :)

Answer:

48.9

Step-by-step explanation:

[tex]\frac{A}{sinA}=\frac{B}{sinB} =\frac{C}{sinC}[/tex]   (you can flip the equation around)

[tex]\frac{21}{sin18} = \frac{AB}{sin134}[/tex]

[tex]AB=\frac{21*134}{sin18}= 48.88448235[/tex]

Sorry for the late answer I was distracted

2x + y = 2

x – 2y = -4

what is x and y?

Answers

Answer:

x = 0

y = 2

Step-by-step explanation:

2x + y = 2 (Multiply by 2)

x – 2y = -4

4x + 2y = 4

x – 2y = -4

5x = 0

x = 0

2x + y = 2

2(0) + y = 2

0 + y = 2

y = 2

Two counters are selected at random from a bag containing 5 red counters and 3 blue counters.

Find the expected number of red counters selected.

Answers

Answer:

1.4

Step-by-step explanation:

Probability of selecting a red counter :

Number of red counter / total number of counters

5 / (5 + 3) = 5 /8 = 0.625

Probability of selecting a blue counter = 0.375

Let number of red counters :

0, 1 or 2

0 red counters :

Expected value = x * p(x)

0 + (0.625*1) + (0.390625 * 2)

0 + 0.625 + 0.78125 = 1.40625

Expected number of red counters = 1.4

7 2/3 +-5 1/2+8 3/4 solve.

Answers

Answer:

big shaq

Step-by-step explanation:

Lydia is a childbirth assistant. The first year of her career, she attended the births of 2 babies. Every year after that, the number of births Lydia attended has been double that of the previous year. After 6 years of working as a childbirth assistant, how many births has she attended in total?

Answers

Answer:24 or 4

Step-by-step explanation:

2x2=4 4x6=24 24 or 4

Suppose that you used technology to find the least-squares regression line from a table of values for two variables and the results were displayed as follows.

m = -0.03576 b = 42.17093 r^2 = 0.8914 r = -0.9438

What can we say about the relationship between the two variables?

Answers

Since the r-value is quite close to -1 (only 0.0562 away), we can conclude that the two variables are strongly negatively associated. This implies that when one variable increases, the other variable decreases.

In statistics, the correlation coefficient is used to quantify the linear relationship between two variables. The r-value ranges from -1 to 1, indicating the degree to which the variables are positively or negatively associated.

The r-value measures the strength and direction of the linear relationship between two variables. It ranges from -1 to 1.

The closer the r-value is to -1, the stronger and more negative the correlation is.

The closer the r-value is to 1, the stronger and more positive the correlation is.

A value of 0 indicates that there is no linear relationship between the variables.In this case, the r-value is -0.9438.

Because the r-value is negative, the two variables are negatively associated. The closer the r-value is to -1, the stronger the negative association is.

Learn more about correlation coefficient at:

https://brainly.com/question/24443084

#SPJ11

Performance Task: Super Survey Simulator

Answers

A performance task is a learning activity that asks students to perform to demonstrate their knowledge, understanding and proficiency.

What is a performance task?

Your information is incomplete. Therefore, an overview will be given. A performance task measure whether a student can apply his or her knowledge to make sense of a new phenomenon.

It should be noted that performance tasks yield a tangible product and performance that serve as evidence of learning.

Learn more about performance on:

https://brainly.com/question/1532968

#SPJ1

The mass of a species of mouse commonly found in houses is normally distributed with a mean of 20.9 grams with a standard deviation of 0.2 grams.

For parts (a) through (c), enter your responses as a decimal with 4 decimal places.

a) What is the probability that a randomly chosen mouse has a mass of less than 20.74 grams?

b) What is the probability that a randomly chosen mouse has a mass of more than 21.14 grams?

c) What proportion of mice have a mass between 20.8 and 21.04 grams?

d) 10% of all mice have a mass of less than grams.?

Answers

Given: The mass of a species of mouse commonly found in houses is normally distributed with a mean of 20.9 grams with a standard deviation of 0.2 grams.

a) The probability that a randomly chosen mouse has a mass of less than 20.74 grams is 0.2119.

b) The probability that a randomly chosen mouse has a mass of more than 21.14 grams is 0.1151.

c) The proportion of mice have a mass between 20.8 and 21.04 grams is 0.4495.

d) 10% of all mice have a mass of less than 21.15632 grams.

(a) The probability that a randomly chosen mouse has a mass of less than 20.74 grams.

Z = (X - μ)/σ, where X = 20.74, μ = 20.9, σ = 0.2.

Z = (20.74 - 20.9)/0.2Z

= -0.8P(X < 20.74)

= P(Z < -0.8)

Using standard normal distribution table, P(Z < -0.8) = 0.2119.

Thus, the required probability is 0.2119.

(b) The probability that a randomly chosen mouse has a mass of more than 21.14 grams.

Z = (X - μ)/σ, where X = 21.14, μ = 20.9, σ = 0.2.

Z = (21.14 - 20.9)/0.2

Z= 1.2

P(X > 21.14) = P(Z > 1.2)

Using standard normal distribution table, P(Z > 1.2) = 0.1151.

Thus, the required probability is 0.1151.

(c) To find the proportion of mice have a mass between 20.8 and 21.04 grams.

Z_1 = (X1 - μ)/σ

= (20.8 - 20.9)/0.2

= -0.5

Z_2 = (X2 - μ)/σ

= (21.04 - 20.9)/0.2

= 0.7

P(20.8 < X < 21.04) = P(-0.5 < Z < 0.7)

= P(Z < 0.7) - P(Z < -0.5)

Using standard normal distribution table,

P(Z < 0.7) = 0.7580

P(Z < -0.5) = 0.3085

Therefore, P(-0.5 < Z < 0.7) = P(Z < 0.7) - P(Z < -0.5)

= 0.7580 - 0.3085

= 0.4495

Thus, the required probability is 0.4495.

(d) 10% of all mice have a mass of less than grams.

Let the mass be X.

We have to find X such that P(X < k) = 0.1

Z = (X - μ)/σ, where μ = 20.9, σ = 0.2.

P(X < k) = P(Z < (k - μ)/σ)

0.1 = P(Z < (k - 20.9)/0.2)

0.1 = P(Z < 5k - 104.5)

Using standard normal distribution table, we get

5k - 104.5 = -1.2816k

k= 21.15632

Thus, 10% of all mice have a mass of less than 21.15632 grams.

To know more about normal distribution, visit:

https://brainly.com/question/15103234

#SPJ11

Let f(x) = 2x–8 and g(x) = x + 2. Find f(g(x)) and g(f(x)).

Answers

Answer:

g(f(x)) = 2x - 6

f(g(x)) = 2x - 4

Step-by-step explanation:

g(f(x)) = 2x - 8 + 2

g(f(x)) = 2x - 6

f(g(x)) = 2(x + 2) - 8

f(g(x)) = 2x - 4

Answer: g ( 2 x − 8 ) = 2 x− 6

Step-by-step explanation: MAKE ME BRAINLIEST!!!!!

A horse 64 feet from the center of a merry-go-round makes 27 revolutions. In order to travel the same distance, how many revolutions would a horse 16 feet from the center have to make?

Answers

The answer will be 107

I really need help please and thank you

Answers

Answer:

x = 8

Step-by-step explanation:

You can set up the equation 6/4 = 12/x and then cross multiply to solve for x

The ages (in years) of nine men and their systolic blood pressures (in millimeters of mercury) are given below. Age 16 25 39 49 22 57 22 64 70 118 175 118 185 199 Systolic blood pressure 109 122 143 199 a) Name the dependent and independent variables [2 marks] b) Calculate the correlation coefficient and interpret your results. [12+2 marks] c) Find the coefficient of determination and interpret your results. [2 marks] d) Develop the regression equation for the data set. e) Predict the blood pressure of a 50-year-old man

Answers

a) Dependent variable: Systolic blood pressure

Independent variable: Age

b) Calculations: xi (age) yi (Systolic blood pressure)xiyi (age × systolic blood pressure)xi^2 (age²)yi^2 (systolic blood pressure²)16 109 1,744 256 11,88125 122 3,050 625 14,88439 143 5,577 1,521 20,44949 199 9,751 2,401 39,60122 118 2,596 484 13,92457 175 9,975 3,249 30,62522 118 2,596 484 13,92464 185 11,840 4,096 34,22570 199 13,930 4,900 39,601∑x = 561∑y = 1,450∑xy = 61,059∑x² = 19,200∑y² = 249,141r = [9 (∑xy) - (∑x)(∑y)] / sqrt([9∑x² - (∑x)²][9∑y² - (∑y)²]) = 0.664- The correlation is moderate positive. As age increases, systolic blood pressure also increases.

c) R² = r² = 0.4416- 44.16% of the variability in systolic blood pressure is explained by age.

d) Regression Equation: y = a + bx where a = (y mean) - b (x mean) Using the means x mean = 62.3 and y mean = 161.1a = (161.1) - b (62.3)a = 33.62y = 33.62 + 1.083x

The regression equation is y = 33.62 + 1.083x.

e) Predicting the blood pressure of a 50-year-old man:y = 33.62 + 1.083xy = 33.62 + 1.083(50)y = 33.62 + 54.15y = 87.77

The predicted blood pressure is 87.77.

To know more about mean refer to:

https://brainly.com/question/14532771

#SPJ11

Three coffees and two muffins cost a total of $7. Two
coffees and four muffins cost $8.
Let x = cost of coffees
Let y = cost of muffins
how do i write this in a system of linear equations?

Answers

Step-by-step explanation:

3 coffees + 2 muffins = $7

therefore,

[tex]3x + 2y = 7[/tex]

2 coffees + 4 muffins = $8

therefore,

[tex]2x + 4y = 8[/tex]

Answer:

i think in every coast we're adding two shillings in the first sentence the total was 5 and we paid $7 and in the second sentence the total was 8 dollars meaning we added to shillings.

Step-by-step explanation:

in my school we are taughtthat we shouldn't mix goats with sheeps so we this the same way we can't mix x and y so in my opinion I guess you can say x + y =to that amount of money at the end you paid if it's 8 dollars or 7 dollars. we can say x represents the coffees and y represents the muffins that's how I get it I hope you want to be angry with me. for example 3 + 2 equals to 7 .3 + 2 is 5 so we'll carry five to the other side of equals where we will make it be minus so we'll say 7 - 5 where will get 2

What is the simplified form of the following expression? Assume y does not equal 0. 3 square root 12x^2 over 16y

Answers

Answer:

Ok y does not = 0 (They say this because is y=0 it would be undefined anything divided by 0 is undefined)

[tex](3\sqrt{12x^2})/16y\\[/tex]

Answer: [tex](3x\sqrt{3})/8y[/tex]

(q8) Find the volume of the solid obtained by rotating the region bounded by
, and the x-axis about the y axis.

Answers

The correct option is:d.9/2 pie units cubbed. The given region is obtained by rotating the curve y = x2 – 3 about the x-axis, which can be represented as:y = x² - 3

We have to rotate this curve around the y-axis. The required volume can be obtained by integrating the area of the circular cross-sections formed after rotating the curve.The radius of each circular cross-section at any value of x is equal to the perpendicular distance between the curve and the y-axis, which is x.

Thus, the area of each circular cross-section can be represented as:A = π(x²)The limits of integration can be found by equating y = x² - 3 to 0, which is:0 = x² - 3x = ± √3

Thus, the volume of the solid obtained by rotating the region bounded by y = x² - 3 and the x-axis about the y-axis is given by:V = ∫-√3^√3 π(x²) dxV = π ∫-√3^√3 (x²) dx.

By using the formula for integration, we get:V = π [(x³)/3] -√3^√3V = π [(√3³ - (-√3)³)/3]V = π (18/3)V = 6π.Therefore, the volume of the solid obtained by rotating the region bounded by y = x² - 3 and the x-axis about the y-axis is 6π units cubed. Hence, the correct option is:d.9/2 [tex]\pi[/tex]units cubbed.

For more question on area

https://brainly.com/question/25292087

#SPJ8

pleaaaaseeeeeee help!!!!!!!!!!!!!!!!!!!!!
brainliest and 20 points

Answers

Answer:

x=0

Step-by-step explanation:

Answer:

Short answer: Empty set ∅

if x is less than -1 then it can't be greater than 1

For a, b, c, d € Z, prove that a - c|ab + cd if and only if a - cl ad + bc. 2. (a) What are the possible remainders when 12 + 16 + 20 is divided by 11? (b) Prove for every n € Z that 121 + n2 +16n+20

Answers

(a) The possible remainders when 12 + 16 + 20 is divided by 11 are 8 and 19.

(b) For every integer n, the expression 121 + n^2 + 16n + 20 is always divisible by 11.

In the first statement, we are asked to prove that a - c divides ab + cd if and only if a - c divides ad + bc. To prove this, we can use the property of divisibility. If a - c divides ab + cd, then there exists an integer k such that ab + cd = (a - c)k. Similarly, if a - c divides ad + bc, there exists an integer m such that ad + bc = (a - c)m. By rearranging the terms, we can express k and m in terms of a, b, c, and d. By substituting these expressions into the equation ab + cd = (a - c)k, we can show that ab + cd = (a - c)(ad + bc)m. Thus, proving the equivalence.

In the second statement, we are asked about the possible remainders when 12 + 16 + 20 is divided by 11. To find the remainder, we can calculate the sum as 48 and then divide it by 11. The quotient is 4 with a remainder of 4. Hence, 12 + 16 + 20 leaves a remainder of 4 when divided by 11.

To prove that 121 + n^2 + 16n + 20 is divisible by 11 for every integer n, we can use algebraic manipulation. By factoring the expression as (n + 4)(n + 4) + 16(n + 4), we can rewrite it as (n + 4)^2 + 16(n + 4). Now, we notice that both terms have a common factor of (n + 4). Factoring it out, we get (n + 4)(n + 4 + 16). This simplifies to (n + 4)(n + 20). Since both factors contain n + 4, we can conclude that the expression is divisible by 11 for any integer n.

To learn more about quotient

Click here brainly.com/question/5832512

#SPJ11

Which is more, 8 yards or 24 feet?

Answers

Answer:

They are the same thing!

Step-by-step explanation:

8*3=24 (Because 1 yard is 3 feet)

24 = 24!

Answer:

8yd 24ft= 48ft 0.000000in

Step-by-step explanation:

is the equation y = x ^2 + 3 a function?

Answers

Answer: Yes it is

Step-by-step explanation:

Answer:

Yes it is. Succese to The homework

carol is making baby blankets for her daughters twins. If one blanket needs 43/4 yd of fabric, how much fabric does carol need for two blankets?

Answers

Answer:

21 1/2 yd

Step-by-step explanation:

43/4 + 43/4 = 21 1/2 yd

Other Questions
Music Media Ltd. prepares statements quarterly.Part A:Required:1. Based on 2019 results, Musics estimated tax liability for 2020 is $297,960. Music will accrue 1/16 of this amount at the end of each month (assume the installments are paid the next day). Prepare the entry on January 31, 2020, to accrue the tax liability and on February 1 to record the payment.2. At year-end, December 31, the actual income tax for 2020 was determined to be $303,420. Prepare the adjusting entry on December 31 to record the accrual (assume 11 months have been accrued to date in 2020). Record the payment on January 1, 2021. Hospital Equipment Company (HEC) acquired several fMRI machines for its inventory at a cost of $3,000 per machine. HEC usually sells these machines to hospitals at a price of $6.480 HEC also separately sells 12 months of training and repair services for fMRI machines for $1,620. HEC is paid $6,480 cash on November 30 for the sale of an fMRI machine delivered on December 1. HEC sold the machine at its regular price but included one year of free training and repair service.1. For the machine sold at its regular price, but with one year of "free" training and repair service, determine the dollar amount of revenue earned from the equipment sale versus the revenue earned from the training and repair service2. Prepare journal entries would HEC record on November 30 and December 1? (Assume HEC uses a perpetual inventory system for recording the cost of goods sold) (if no entry is required for a transaction/event, select "No Journal Entry Required in the first account field.) You have 4 flower pots in your home one at a balcony, one at a kitchen window, one on the kitchen floor and one on the table in the living room. Your local store has 11 different kinds of flowers for pots. Suppose you want to buy flowers for all your pots so that each pot has a different kind of flower. How many different ways are there to do it? Show your work. What if you decide to move all the flower pots into the kitchen, so it doesn't matter which type of flower is in which pot - how many different choices of four different flower types do you have now? Show work. If you covered confidence intervals for differences between population proportions in the homework of the previous lesson, continue on to complete the rest of those problems here. Continuing with the sample data from the previous problem, let's find a confidence interval for the difference between the proportions of wives and husbands who do laundry at home. Use technology to compute a 99% confidence interval for the difference in population proportions, P.-P. Find the P-value for a left-tailed hypothesis test with a test statistic of z= - 1.49. Decide whether to reject H, if the level of significance is a = 0.05. Suppose that the economy is described as follows C= 1800-30m I = 1400-150r (where r is the real interest rate) G 900 X = 300 M = 600. Use the information provided above to write down the Aggregate Demand (AD) function. What variables is the AD a function of? What in your opinion are the primary reasons for man's cruelty towards one of his own species? 2. Given the nature vs. nurture debate, how do you explain the non-criminal person raised in a criminal household or environment who is exposed to a daily or frequent diet of delinquency and other related acts? 3. Man by nature is a fighting animal. Hence, to think of a crimeless society is a myth as there is no society without the problem of crime and criminals. Based on this philosophy, do you concur with the treatise 'crime is a normal phenomenon' of Emile Durkheim.use info from Adler, F., Mueller, G.O.W., & Laufer, W.S. Criminology. McGraw-Hill Education; 10th edition (2022).ISBN-13: 978-1-264-16960-3 chapter 1-3 T/F. the ghost dance religion included dances and songs proclaiming the return of the buffalo and the resurrection of dead ancestors in a land free of the white people he real risk-free rate is 2.00%. Inflation is expected to be 2.20% this year and 6.00% next year. What is the yield on 2-year T-securities (report the percentage number with two decimal places and do not include % in your answer)? Suppose the price level is fixed, the MPC is 0.5, and the GDP gap is a negative $80 billion. To achieve full employment output (exactly), by how much should the government reduce taxes? What correctly instantiates a house object if the house class contains a single constructor with the declaration house(int bedrooms, double price)? In 2020, eighty percent of U.S. households had an internet connection (p = 0.8). A sample of 200 (n) households taken in 2021 showed that 76% of them had an internet connection (p = 0.76). We are interested in determining if there has been a significant decrease in the proportion of U.S. households that have internet connections. 1. State your null and alternative hypotheses: 2. What is the value of the test statistic? Please show all the relevant calculations. 3. What is the p-value? 4. What is the rejection criterion based on the p-value approach? Also, state your Statistical decision (i.e., reject /or do not reject the null hypothesis) based on the p-value obtained. Use a = 0.1 What is a blooper? Television producer Kermit Schaefer first defined the word blooper to describe mistakes made on television, in radio, and in films. Today the word blooper is used to describe any embarrassing blunder. In this textbook we use the word blooper to refer to language mistakes made in writing and speech. At the end of each chapter, you will find a list of written and spoken bloopers. Many of these bloopers appeared in prestigious publications or were spoken by highly respected individuals. Using the skills you are learning in this class, try to identify why the following items are bloopers. Consult your textbook, dictionary, or reference manual as needed. Also think about what part of speech each blooper demonstrates. To see if you recognized the blooper, go to www.cengagebrain.com and use your access code to see the Spot the Blooper key.Blooper 6: In a Washington Post article: "What drains out is an intensely sweet juice that is fermented into a pricey wine found on the desert lists of the finest restaurants." The Consumer Product Safety Commission is primarily responsible for protecting the public from misleading television ads for products.True or False When GDP per person in China in 2016 is valued at ___ GDP per person in the United States is___ Simes that in China. A. purchasing power parity prices; 5.3 B. the market exchange rate: 6.3 C. the market exchange rate: 3.8 D. purchasing power party prices: 6.3 at what speed do a bicycle and its rider, with a combined mass of 80 kgkg , have the same momentum as a 1800 kgkg car traveling at 4.8 m/sm/s ? The primary role of business technology during the 1970s was toa. support existing business by improving the flow of financial information.b. empower workers by giving them access to greater amounts of information.c. implement new production methods that relied on automated equipment.Incorrectd. protect proprietary company information from outsiders. Assume a company has inventory valued at $50,000, its total current assets, including this inventory, total $90,000. Its total current liabilities total $20,000. Its quick ratio is: .5 1 1.8 less than 1 Which of the following statements regarding direct finance is true? A. Securities are assets for the firm that issues them and liabilities for the individual that buys them. B. Direct finance occurs when borrowers sell securities directly to lenders. C. Direct finance requires the use of financial intermediaries. D. In the United States, more funds flow through the direct financial channels than through indirect financial channels. Let's assume that a carpenter borrowed $2,000 to be paid off in a year to finance a machine that would make him work faster As a result, he is able to take on more projects and collect $400 more earnings in the first year, after paying off the principal of $2,000. However there is a 15% rental fee (interest) on his loan that he also has to pay off. The carpenter earned an extra $ in the first year (Round your response to the nearest dollar) Which best describes the Hospitality and Tourism career cluster?A group of careers that focus on going from one place to another for business, pleasure, or other reasons.A group of careers that focus on the act of traveling, sightseeing, and enjoying activities that are specific to a location.A group of careers that focus on being welcoming to guests, such as guests who stay for a meal or who stay overnight.A group of careers that focus on providing people with food, a place to stay, assistance to travelers, and fun activities.