SOLUTION: a world globe is a sphere. the formula for the volume of a sphere is V=4pier^3/3 and the formula for surface area is SA=4pier^2. Part A. Write an expression for the ratio of the

Question 433820: a world globe is a sphere. the formula for the volume of a sphere is V=4pier^3/3 and the formula for surface area is SA=4pier^2.
Part A. Write an expression for the ratio of the surface area of a sphere to its volume.
Part B. Simplify the expression.
Found 2 solutions by psbhowmick, stanbon:
Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!

Part A:
Part B:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a world globe is a sphere. the formula for the volume of a sphere is V=4pier^3/3 and the formula for surface area is SA=4pier^2.
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Part A. Write an expression for the ratio of the surface area of a sphere to its volume.
S:V = (4(pi)r^2):((4/3)(pi)r^3)
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Part B. Simplify the expression.
S:V = 3/r
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Cheers,
Stan H.
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