Answer:
381.7 in³
Explanation:
You want the volume of a sphere 9 inches in diameter.
Volume
A suitable formula for the volume of a sphere is ...
V = π/6d³ . . . . . . where d is the diameter
Then the volume of a 9" sphere is ...
V = π/6(9 in)³ = 121.5π in³ ≈ 381.7 in³
The volume of a 9-inch basketball is about 381.7 cubic inches.
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Additional comment
The above answer is found using the calculator's "pi button." If we use 3.14 instead, the volume is calculated as 381.51 in³.
The formula you usually see for the volume of a sphere is ...
V = 4/3πr³ . . . . where r = d/2
Either formula will give the same result.