Question

The function f(r) gives the area of a circle with radius r. It can be written in equation form as fr) = 3.14/2². What is f(5)?

Answer 1

basically all u do is sub in 5 for r.

Explanation:

f(5) = 3.14 * 5^2

f(5) = 3.14 * 25

f(5) = 78.50 <===