4 years ago

A circular mirror has the diameter of 12 inches. what is the area in square inches?

1 answer:

5 0

Hello!

To find the area of a circle you do $\pi r^{2}$

Where r stands for radius.

The radius is just half the diameter

So you put that into a calculator and get 113.1 $in^{2}$

Hope this helps!

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Circle the equation that does not belong and explain why?

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4 years ago

Solve the equation 5x - 8 < -18

vekshin1

5x-8< -18
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4 years ago

Small sample: During an economic downturn, companies were sampled and asked whether they were planning to increase their workfor

leva [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The confidence level interval is $0.016 \le C \le 0.404$

Step-by-step explanation:

The sample size is $n = 20$

The number planning to increase workforce is $x = 3$

The confidence level is $c = 98$ %

The value of proportion for a plus 4 method is

$p = \frac{x+2}{n+4}$

substituting values

$p = \frac{3+2}{20+4}$

$p =0.21$

The z-critical value at confidence level of 98% is

$z_{c}=z_{0.98} = 2.33$

This values is obtained from the standard normal table

The confidence level interval can be mathematically represented as

$C =p \ \pm z_{c} * \sqrt{\frac{p(1-p)}{n+4} }$

substituting values

$C = 0.21 \pm 2.33 * \sqrt{\frac{0.21(1- 0.21)}{20 +4} }$

$C = 0.21 \pm 0.194$

=> $0.016 \le C \le 0.404$

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3 years ago

The three sides of a triangle measures 9.97

stira [4]

I think 3.323 units would be the correct answer. Are you asking what the length of a single side is?

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3 years ago

The question is on the sheet.

arlik [135]

D I think hop this helps

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3 years ago