SOLUTION: The surface area of a ballon varies directly as the square of its radius. The Area is 325 square inches when the radious is 5 inches. What is the surface area when the radius is 9
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Question 868850: The surface area of a ballon varies directly as the square of its radius. The Area is 325 square inches when the radious is 5 inches. What is the surface area when the radius is 9 inches?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
area 325
r=5
325 =k *5^2
325/25 = k
13=k
r=9
S= 13*9^2
S= 1053 sq.units
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