Question

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

Answer 1

Answer:

The value of f(3) = 28.26

Step-by-step explanation:

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

$f(r) = 3.14 \times {r}^{2}$

$f(3) = 3.14 \times {3}^{2}$

$f(3) = 3.14 \times 9$

$f(3) = 28.26$