SOLUTION: the diameter of a sphere with a surface area of 81pie square yards

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Question 1081467: the diameter of a sphere with a surface area of 81pie square yards

Found 2 solutions by MathLover1, Alan3354:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

SA+=+4pi%2Ar%5E2 where r is the radius
the diameter of a sphere with a surface area of SA=81%2Api%2Ayd%5E2 is:
4pi%2Ar%5E2=81%2Api%2Ayd%5E2
r%5E2=%2881%2Api%2Ayd%5E2%29%2F4pi
r%5E2=%2881%2Across%28pi%29%2Ayd%5E2%29%2F4cross%28pi%29
r%5E2=%2881yd%5E2%29%2F4
r=sqrt%28%2881yd%5E2%29%2F4%29
r=sqrt%28%289%5E2yd%5E2%29%29%2Fsqrt%284%29
r=9yd%2F2
r=4.5yd


Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
No math problems with pie, unless it's a pie chart.
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Use the Greek letter pi.
If you don't, your peers will know you're a moron.