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 8.4 - Circumference and Area of a Circle - Exercises - Page 384: 34


(a) $56.5~ft$ (b) 10 strips (c) $155.40

Work Step by Step

(a) We can find the circumference: $C = \pi~d = (\pi)(18~ft) = 56.5~ft$ (b) We can find the required number of strips: $\frac{56.5~ft}{6~ft} = 9.4$ Since the strips are sold in lengths of 6 feet, we need to buy 10 strips. (c) We can find the cost: $cost = (\$2.59/ft)(10)(6~ft) = \$155.40$
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