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natka813 [3]
3 years ago
7

A cylinder with radius 7 and height 4 is in table,then find its volume?​

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
8 0

Answer:

V = ≈615.75

Step-by-step explanation:

hopefully that helped

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A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop
attashe74 [19]

Answer:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

Step-by-step explanation:

Information given:

X= 36 represent the families owned at least one DVD player

n= 85 represent the total number of families

\hat p=\frac{36}{85}= 0.424 represent the estimated proportion of families owned at least one DVD player

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.05. And the critical value would be given by:

z_{\alpha/2}=-2.58, z_{1-\alpha/2}=2.58

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.424 - 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.286

0.424 + 2.58\sqrt{\frac{0.424(1-0.424)}{85}}=0.562

The 99% confidence interval would be given by (0.286;0.562)

8 0
3 years ago
lauren is driving to the grocey store.Tye average distance is d,in miles,she travels over t minutes is giving is givin bu the fu
yulyashka [42]

Answer:

Average distance traveled in 15 minutes = 7.5 miles

Step-by-step explanation:

Given function:

d(t)=0.5t

where d represents average distance traveled in miles and t represents time in minutes traveled.

To find the average distance traveled in t=15 minutes.

Solution:

In order to find the distance traveled in 15 minutes, we will input t=15 in the given function.

d(15)=0.5(15)

d(15)=0.5\times 15

d(15)=7.5 miles

Average distance traveled in 15 minutes = 7.5 miles

4 0
3 years ago
Simplify<br> (X+4)+(2x+3)
vfiekz [6]

Answer:

3x + 7

Step-by-step explanation:

<u>Step 1:  Distribute the plus</u>

(x + 4) + (2x + 3)

x + 4 + 2x + 3

<u>Step 2:  Combine like terms</u>

x <u>+ 4</u> + 2x <u>+ 3</u>

<em>3x + 7</em>

<em />

Answer:  3x + 7

<u>If needed solve</u>

3x + 7 - 7 = 0 - 7

3x / 3 = -7 / 3

<em>x = -7/3</em>

8 0
3 years ago
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The dot plot shows the heights of the players on two basketball teams.
Masteriza [31]
The dot plot is wrong as I am right
3 0
3 years ago
State the gradients and the y intercepts of y=2x+6​
LekaFEV [45]

Answer:

y-intercept: Put x = 0 in the equation y = 2x - 6 and solve for x. The y-intercept is -6.

6 0
3 years ago
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