Question

F(r) = 3.14r2 . What is f(3)?

Answer 1

The value of f(3) = 28.26

Explanation:

You have to do is to substitute r = 3 into the function :

`f(r) = 3.14 * {r}^(2)`

`f(3) = 3.14 * {3}^(2)`

`f(3) = 3.14 * 9`

`f(3) = 28.26`