SOLUTION: Hester needs 14 square feet of material to make an inflatable ball. How much material to the whole foot would she need to make a ball with twice the diameter of the original?

Question 632464: Hester needs 14 square feet of material to make an inflatable ball. How much material to the whole foot would she need to make a ball with twice the diameter of the original?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Hester needs 14 square feet of material to make an inflatable ball. How much material to the whole foot would she need to make a ball with twice the diameter of the original?
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surface area of a sphere=4πr^2
this means surface area of a sphere is proportional to the square of the radius
twice the diameter=twice the radius
material new ball will need=2^2*14=4*14=56 sq ft
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