SOLUTION: A circle has an area of 75 square centimeters. What is its radius?

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Question 537114: A circle has an area of 75 square centimeters. What is its radius?
Answer by Earlsdon(6287) About Me  (Show Source):
You can put this solution on YOUR website!
Remember that, for a circle: A+=+pi%2Ar%5E2
A+=+pi%2Ar%5E2 Substitute A+=+75 and solve for r.
75+=+pi%2Ar%5E2 Divide both sides by pi.
75%2Fpi+=+r%5E2 Take the square root of both sides.
sqrt%2875%2Fpi%29+=+r or highlight%28r+=+sqrt%2875%2Fpi%29%29 Discard the negative solution as the radius is a positive quantity.