Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 5 - 5.4 - Exponential and Logarithmic Equations - 5.4 Exercises - Page 396: 87



Work Step by Step

$T=20+60e^{-0.06m}$ $70=20+60e^{-0.06m}$ $50=60e^{-0.06m}$ $\frac{5}{6}=e^{-0.06m}$ $\ln e^{-0.06m}=\ln\frac{5}{6}$ $-0.06m=\ln\frac{5}{6}$ $m=\frac{\ln\frac{5}{6}}{-0.06}=3.039$
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