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(5)

A) 78.50
B) 31.40
C) 28.14
D) 246.49

Answer 1

A.78.50

Explanation:

f(r)=3.14r^2

5^2=25

3.14*25=78.50

I hope this is correct if it is then I hope it helps.

Answer 2

f(r)=3.14r^2

f(5)=3.14(5)^2 = 3.14 x 25 = 78.5

answer
A) 78.50