Question

What is the area of a circle if the circumference is 6pi?

Answer 1

area = pi r ^2
circumference = 2 pi r
6pi=2pir
r=3
area = 9pi

Answer 2

Are you just copying and pasting questions? >.> There's WolframAlpha for that @ wolframalpha.com.

Answer 3

no i have a calculus placement test determining whether or not im going to be takin AP cal. AB or BC, so im trying to do this study guide,,