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OpenStudy (anonymous):
prolly easy.. but idk.. :o If a tennis ball has a diameter of approximately 6.9 centimeters, what is its surface area?
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OpenStudy (anonymous):
Whats the formula for the surface area of a sphere?
OpenStudy (anonymous):
4pi*r^2?
OpenStudy (anonymous):
i don't see anything wrong with that formula... plug it in danny....
OpenStudy (anonymous):
i got 149.63 what did i do wrong :o?
OpenStudy (anonymous):
hmm.... 4*3.14*(6.9)*(6.9) try that one...
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OpenStudy (anonymous):
598.45?
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