If the diameter of a regulation size basketball is 9.4 inches, what is the surface area? round to the nearest tenth.
a.59.1 in²
b.69.4 in²
c.88.4 in²
d.277.6 in²

Given,

Diameter of the basketball = 9.4 inches
∴ Radius of the basketball = diameter ÷ 2 = 9.4 ÷ 2 = 4.7 inches
π = 3.14159

Surface area of the basketball is the surface area of the sphere = 4 π r² = 4 × 3.141 x 4.7² = 277.59 = 277.6 inches²

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