Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 8 - Section 8.5 - More Area Relationships in the Circle - Exercises - Page 391: 43


A$\approx$5890.5 ft$^2$

Work Step by Step

A=$\frac{1}{4}$$\pi$R$^2$-$\frac{1}{4}$$\pi$r$^2$ A=$\frac{1}{4}$$\pi$(380)$^2$-$\frac{1}{4}$$\pi$(370)$^2$ A=36,100$\pi$-34,225$\pi$ A=1,875$\pi$ A$\approx$5890.5 ft$^2$
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