Answer
2011
Work Step by Step
$P=75\ln t+540$
$720=75\ln t+540$
$180=75\ln t$
$\ln t=\frac{180}{75}=2.4$
$e^{\ln t}=e^{2.4}$
$t\approx11$
Algebra and Trigonometry 10th Edition
by Larson, Ron
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: 85
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