A sphere has a surface area of 16π square inches. What is the radius of the sphere?
Correct: B
The formula for the surface area of a sphere is A = 4πr^2, where A is the surface area and r is the radius. Given that the surface area is 16π, we solve for r: 4πr^2 = 16π. Dividing both sides by 4π gives r^2 = 4. Taking the square root of both sides gives r = 2 inches.