Question

1. to find the volume of a sphere, you need to know its:

a. surface area
b. radius
c. circumference
d. diameter

Explanation:

The formula for the volume of a sphere is \( V=\frac{4}{3}\pi r^{3}\), where \( r \) is the radius of the sphere. While diameter (\( d = 2r\)), circumference (\( C=2\pi r\)) and surface area (\( S = 4\pi r^{2}\)) are related to the radius, the most direct and fundamental measurement needed in the volume formula is the radius.

Answer:

B. Radius