College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 4, Exponential and Logarithmic Functions - Chapter 4 Review - Concept Check - Page 425: 74


$k=-\frac{1}{15}\ln 10000\approx-0.614023$

Work Step by Step

We solve for $k$: $e^{-15k}=10000$ $\ln e^{-15k}=\ln 10000$ $-15k=\ln 10000$ $k=-\frac{1}{15}\ln 10000\approx-0.614023$
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