Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 8 - Section 8.1 - Finding Roots - Exercise Set: 87

Answer

70 mph No, because the calculated velocity of 70 mph exceeds the 50 mph speed limit.

Work Step by Step

$v=\sqrt {20L}$ Substitute the given length for L and solve for v. $v=\sqrt {20\times245}$ Simplify. $v=\sqrt{4900}$ $v=70$
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