Answer
8 mph
Work Step by Step
$v=4\sqrt r$
Substitute the given radius for r and solve for v.
$v=4\sqrt 4$
Simplify.
$v=4\times2=8$
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
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 - Page 575: 85
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