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) = 3.14r2. What is the value of A(5)?
A:31.40
B:78.50
C:28.14
D:246.49

Answer 1

B: 78.50

If you plug in 5 for r, then you get  3.14 * 25, which is equal to 78.5 

Hope this helps!