SOLUTION: A circle that has a surface area of 225......what is the circumference?

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Question 260034: A circle that has a surface area of 225......what is the circumference?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
A=pi*r^2=225
r^2=225/pi
r=sqrt(225/pi)
2*pi*r=C
2*pi*sqrt(225/pi)
2*pi*15*sqrt(1/pi)
30*sqrt(pi^2/pi)
30*sqrt(pi)