SOLUTION: express the area s of a circle as a function of its radius r. find s (7).

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Question 890646: express the area s of a circle as a function of its radius r. find s (7).
Answer by Alan3354(69443) About Me  (Show Source):
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express the area s of a circle as a function of its radius r.
s%28r%29+=+pi%2Ar%5E2
find s(7)
s%287%29+=+49%2Api