Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 8 - Section 8.4 - Circumference and Area of a Circle - Exercises - Page 373: 35


(a) $A = 201~ft^2$ (b) 3 quarts (c) $47.67

Work Step by Step

(a) We can find the area: $A = \pi~r^2$ $A = (\pi)(8~ft)^2$ $A = 201~ft^2$ (b) We can find the number of quarts required: $\frac{201~ft^2}{70~ft^2/quart} = 2.9$ Since paint is sold in quarts, we need to buy 3 quarts of paint. (c) We can find the cost: $cost = (\$15.89)(3) = \$47.67$
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