Question

The function f(r) gives the area of a circle with radius r. It can be written in equation form as f(r) = 3.14 r2. What is f(4).

Answer 1

D (50.24)

Explanation:

If you plug in 4 into the function f(r)

3.14 * (4) ^ 2

= 16 * 3.14

= 50.24