Question

The function f(r) gives the area of a circle with radius r it can be written in equation form f(r)=3.14r^2 What Is f(3)

Answer 1

f(3), replace r with 3
f(3)=3.14(3)^2=3.14(9)=28.26
f(3)=28.26

Answer 2

Answer:
`f(3)=28.26`

Explanation:

Given: The function
`f(r)` gives the area of a circle with radius 'r' it can be written in equation form
`f(r)=3.14r^2`

To find f(3), we need to substitute r=3 in the given function of area we get,

`f(3)=3.14(3)^2\\\Rightarrow\ f(3)=3.14*9\\\Rightarrow\ f(3)=28.26`

Hence,
`f(3)=28.26`