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3 years ago

What is the least perimeter of are tangle with an ware of 32 square feet

Mathematics

2 answers:

Tasya [4]3 years ago

7 0

The final; answer is 47!!!!!!!!

rodikova [14]3 years ago

6 0

The square root of 32 is x

4x is the least perimeter

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3 years ago

The measure of the exterior angle of the triangle is

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2 years ago

A Confidence interval is desired for the true average stray-load loss mu (watts) for a certain type of induction motor when the

Vaselesa [24]

Answer:

A sample size of 35 is needed.

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, find the width W as such

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

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

How large must the sample size be if the width of the 95% interval for mu is to be 1.0:

We need to find n for which W = 1.

We have that $\sigma^{2} = 9$ , then $\sigma = \sqrt{\sigma^{2}} = \sqrt{9} = 3$ . So

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

$1 = 1.96*\frac{3}{\sqrt{n}}$

$\sqrt{n} = 1.96*3$

$(\sqrt{n})^2 = (1.96*3)^{2}$

$n = 34.57$

Rounding up

A sample size of 35 is needed.

3 0

2 years ago

Given sin(theta)= 12/13 in quadrant 1 determine sec(theta) PLS HELP ASAP

Genrish500 [490]

Answer:

Step-by-step explanation:

in quadrant 1 cos and sec are positive.

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2 years ago

The length of the rectangle is 9 inches. The area is 72 square inches. What is the width of the rectangle?

mote1985 [20]

Answer:

Step-by-step explanation:

Formula for area = Length times width

72 divided by 9 = 8

Double check: 9(length) x 8 (width) = 72 (area).

Width = 8 inches

Hope this helped! If it did, please give brainliest! :)

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2 years ago