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)=3.14r^2. what is the value of A(4)

Answer 1

$\pi$r^2 = area
r = 4, $\pi$ * 4^2 = 16$\pi$
Area = 50.24 (2 d.p.)

Answer 2

50.25 GOD BLESS YALL that's the answer I am pretty sure