Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.5 Solve Quadratic Equations by Finding Square Roots - 4.5 Exercises - Problem Solving - Page 271: 42a


$\approx24.559$ mph

Work Step by Step

Plugging in $R=5$ we get $5=0.00829s^2\\s^2=\frac{5}{0.00829}\\s=\pm\sqrt{\frac{5}{0.00829}}$ But $s$ must be non-negative, thus $s=\sqrt{\frac{5}{0.00829}}\approx24.559$
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