Answer
See below
Work Step by Step
Let the inside and outside radii of the walkway be x feet and y feet
The equation relating x and y is:
$$\pi y^2-\pi x^2=600\\\pi(y^2-x^2)=600\\y^2-x^2=\frac{600}{\pi}$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 9 Quadratic Relations and Conic Sections - 9.5 Graph and Write Equations of Hyperbolas - 9.5 Exercises - Problem Solving - Page 647: 42a
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