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1. A sphere of radius r has surface area A = 4r2 and volume V = 4 3 r3. The radius of sphere two is

1. A sphere of radius r has surface area A = 4r2 and volume V = 4 3 r3. The radius of sphere two is four times the radius of sphere one.

(a) What is the ratio of the areas, A2/A1?

(b) What is the ratio of the volumes, V2/V1?

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