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OpenStudy (anonymous):
Find the surface area of a sphere that has a diameter of 4 cm. 64π cm2 π cm3 4π cm2 16π cm2
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OpenStudy (anonymous):
SA = 4Ï€r^2
OpenStudy (anonymous):
but none of my answers are on the choices :(
OpenStudy (anonymous):
diameter is twice the radius. so radius would be 2, then plug that into to the formula posted above
OpenStudy (anonymous):
so 2^2 becomes 4 once again, and 4 times 4 is 16 so your answer is 16 pi cm 2
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