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Mathematics 13 Online
OpenStudy (anonymous):

If a tennis ball has a diameter of approximately 6.7 centimeters, what is its surface area?

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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