Question

A(r) is a function that gives the area of a circle with radius r. It can be written in equation form as A(r)=3.14r2. What is the values of A(5)?

Answer 1

f(r) = 3.14r^2....and ur looking for f(5)....so basically all u do is sub in 5 for r.

f(5) = 3.14 * 5^2
f(5) = 3.14 * 25
f(5) = 78.50 <===

THE ANSWER IS 78.50