S=4*pi*r2
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Surface area of a sphere = 4*pi*radius2
Surface area of a sphere = 4*pi*radius squared
Surface area = 4*Pi*radius2
Surface area of a sphere = 4*pi*radius2 Surface area = 4*pi*42 => 201.0619298 Surface area of the sphere = 201 square units correct to three significant figures.
The surface area of the sphere with the radius doubled is 200 units2.---> Confirmed