It is: 4*pi*52 = 314.159 square cm to three decimal places
Surface area of sphere = 4*pi*122 = 1809.557368 or about 1810 square cm
Surface area = 314.2 cm2
The surface area of a sphere with a radius of 2 is about 50.27 units2
The surface area of the sphere with the radius doubled is 200 units2.---> Confirmed
The surface area of a sphere with a radius of 7 is about 615.8 units2