The function f(r) gives the area of a circle with radius r.
It can be written in equation form as f(r) = 3.14p2
What is f(4)?
To find f(4), we need to substitute r=4 into the equation for f(r) and calculate the result.
f(4) = 3.14 * (4)^2
= 3.14 * 16
= 50.24
Therefore, f(4) is equal to 50.24.