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OpenStudy (anonymous):
tennis ball has a diameter of approximately 6.5 centimeters, what is its surface area?
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OpenStudy (anonymous):
shere SA= 4(pi)r^2 so this is simple. we get SA=4(pi)(6.5)^2 which comes out to 169(pi)
OpenStudy (anonymous):
make sure to include the squared units! like feet squared or meters squared!
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