Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 3 - Section 3.2 - Introduction to Functions - Exercise Set - Page 142: 92


$64\pi$ square feet

Work Step by Step

We are given that $A(r)=\pi r^{2}$. This relation is written in function notation, which tells us that the area of a circle is a function of its radius. Therefore, if we know the radius of a circle, we can calculate the area of that circle. We are given that the radius is 8 feet. We can insert $r=8$ into the equation to find the area of the circular garden. $A(8)=\pi 8^{2}=\pi \times8\times8=64\pi$ square feet
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