Question

What is the surface area of a sphere with radius 3?

A. 18 units²
B. 36 units²
C. 37 units²
D. 9 units²

Answer 1

(B) 36 units²

Explanation:

The surface area of a sphere with radius 3 is 36π units², or approximately 113.1 units²

The formula for the surface area of a sphere is 4πr², where r is the radius of the sphere. Plugging in a radius of 3 into this formula gives us 4π(3)² = 36π units²

Answer 2

B. 36π units²

Explanation:

SA = 4πr²

SA = 4 × π × 3²

SA = 36π units²