A circle has a radius of 8 inches what is the area in terms of pi

4pi in2

8pi in2

18 pi in2
64 pi in2

i dont know pi

Step-by-step explanation:

The radius is 18 feet.

Step-by-step explanation:

The radius is half the diameter, or . The diameter of this circle is 36 feet, so the radius is feet.

The sample size for restaurants that earn less than $50,000 last year is; 564

The formula for margin of error of proportions is; E = z√(p^(1 - p^)/n)

Where;

z is the critical value at given confidence level.

From tables, the value of z at confidence level of 95% is 1.96.

Now, we are given;

Margin of error; E = 0.04

Sample proportion; p^ = 81/130 = 0.6231

To determine a sample size for restaurants that earn less than $50,000 last year, we just make sample size (n) the subject of the formula in the formula for margin of error to get and then solve with the relevant values.

Thus;

n = z²(p^(1 - p^)/E²

Plugging in the relevant values gives;

n = 1.96²(0.6231(1 - 0.6231))/0.04²

n = 563.866

n ≈ 564

Read more about margin of error for proportions at; link