SOLUTION: Help with exponential functions. The formula for the volume of a cylinder of radius r is V = π r^2h a) Solve this equation for r. Write two versions, one in radical form and on

Question 1138950: Help with exponential functions.
The formula for the volume of a cylinder of radius r is V = π r^2h
a) Solve this equation for r. Write two versions, one in radical form and one in exponential form.
b) Determine the radius of a cylinder with a volume of 4356π cm^3 and height of 9 cm.
Found 2 solutions by josgarithmetic, Boreal:
Answer by josgarithmetic(39621) (Show Source): You can put this solution on YOUR website!
done yesterday

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
V = π r^2h
r^2=V/(pi*h)
r=sqrt (V/(pi*h))
r=V^(1/2)/(pi*h)^(1/2)
4356 pi=pi*r^2*9
r^2=484
r=22 cm
r=66/sqrt(9)=22 cm. (the pi cancels)
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