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OpenStudy (anonymous):
If a tennis ball has a diameter of approximately 6.7 centimeters, what is its surface area?
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OpenStudy (anonymous):
Surface area of sphere = 4 * pi * r^2
OpenStudy (anonymous):
you are given diameter, which is 2 times r. So, figure out r. Plug in the formula. Off you go!
OpenStudy (anonymous):
141.03 square centimeters is what it seems to be
OpenStudy (anonymous):
4X3.14X3.35X3.35
OpenStudy (chriss):
That's what I got.
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