the surface area quadruples.
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The surface area of the sphere with the radius doubled is 200 units2.---> Confirmed
The surface area of a sphere with a radius of 2 is about 50.27 units2
The surface area of a sphere with a radius of 7 is about 615.8 units2
a. 2 to 5.
The volume is increased by a factor of 23 = 8.