Find the exact area of a circle having the given circumference. 8 a = 4√2 16 64

Hello!

I believe that you mean 8π as the exact measure of the circumference. With that, we can find the exact area.

The formula for the area of a circle is: A = πr².

Thus, we need to find the diameter of the circle and divide it by 2 to find the radius.

To find the diameter of a circle given the circumference, use the formula: d = C / π.

d = 8π / π

d = 8

The radius is half of the diameter, so therefore, the radius is 4.

With that, we can find the exact area.

A = πr²

A = 4² · π

A = 16π

Therefore, the exact area of the circle is choice B, 16π.

The answer to this question is choice b 16

Step-by-step explanation:

  about 5.6 days

step-by-step explanation:

we can fill the given information into the decay equation and solve for the value of t at which half the sample remains.

the half-life is about 5.6 days.

your answer is b ^w^ hope i