Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.6 Rational Exponents - R.6 Exercises - Page 64: 79

Answer

(a) $250\ sec$ (b) $0.3536$

Work Step by Step

(a) Given $t=31.293\ w^{-1.5}$, for $w=25\ lb$, we have $t=31.293\cdot 25^{-1.5}\approx250\ sec$ (b) $t_1=31.293\ w_1^{-1.5}$ and $t_2=31.293\ (2w_1)^{-1.5}$, thus $\frac{t_2}{t_1}=2^{-1.5}\approx0.3536$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.