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3 years ago

6

3. A rectangular prism has dimensions of 1/2 , 2, and 7/2 in.

1 answer:

swat323 years ago

6 0

Answer:

<em>A</em>

Step-by-step explanation:

B.In

geometry, a prism is a polyhedron comprising an n-sided polygon base, a second base which is a translated copy of the first, and n other faces, necessarily all parallelograms, joining corresponding sides of the two bases. All cross-sections parallel to the bases are translations of the bases.

C.4 cubes is have

I hope it helps

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After filling a gas tank the odometer read 82,803.6 After the next filling it read 83,034.6 it took 16.5 gallons to fill the tan

ELEN [110]

83,034.6 - 82,803.6 = 231 miles

231/16.5 = 14 miles per gallon

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3 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir

Ksju [112]

Answer:

We need a sample size of at least 75.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, we find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So:

$\sigma = \sqrt{484} = 22$

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$5 = 1.96*\frac{22}{\sqrt{n}}$

$5\sqrt{n} = 43.12$

$\sqrt{n} = \frac{43.12}{5}$

$\sqrt{n} = 8.624$

$(\sqrt{n})^{2} = (8.624)^{2}$

$n = 74.4$

We need a sample size of at least 75.

6 0

3 years ago

Read 2 more answers

Question 1) Which one doesn't belong?

Sidana [21]

Answer:

c

Step-by-step explanation:

3 0

3 years ago

Find f(2) if f(x) = 3x - 9

Anvisha [2.4K]

Answer:

-3

Step-by-step explanation:

their is your answer

7 0

3 years ago

Can someone help me find the answer?

icang [17]

Answer:

a. x = 3/a

Step-by-step explanation:

Add all like terms on left hand side of the equation:

5 ax + 3 ax => 8 ax

Bring like term 4ax on left hand side

8ax - 4ax

=> 4ax

Therefore we get 4ax = 12

ax = 12/4

ax = 3

x = 3/a

6 0

3 years ago