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:

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb