SOLUTION: the area of a circle is 9 pi square feet. what is the radius of the circle?

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Question 705370: the area of a circle is 9 pi square feet. what is the radius of the circle?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
A = pi*r^2

9pi = pi*r^2

9pi/pi = pi*r^2/pi

9 = r^2

r^2 = 9

r = sqrt(9)

r = 3


The radius is 3 feet
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