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OpenStudy (anonymous):
Find the surface area of a sphere with a diameter of 14 cm. Leave your answer in terms of pi @Directrix
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Directrix (directrix):
A = 4 * π * r² A = 4 * π * 7 ²
Directrix (directrix):
The diameter is twice the radius so you have to take half the diameter of 14 to get the radius.
OpenStudy (anonymous):
i got 615.75 ..did i do it wrong
Directrix (directrix):
The instructions say to give the answer in terms of pi. That means do not put 3.14 for pi.
Directrix (directrix):
I got 196π
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OpenStudy (anonymous):
sorry i did that
OpenStudy (anonymous):
thats it
Directrix (directrix):
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