College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises: 103

Answer

(a) 8.6 km/h (b) 14.7 km/h

Work Step by Step

(a) We use $P=10000$: $10000=15.6v^{3}$ $v^{3}\approx 641.02$ $v\approx 8.6$ So the wind would have to blow at a speed of 8.6 km/h. (b) We use $P=50000$: $50000=15.6v^{3}$ $v^{3}\approx 3205.13$ $v\approx 14.7$ So the wind would have to blow at a speed of 14.7 km/h.
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