College Algebra 7th Edition

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

Chapter 4, Exponential and Logarithmic Functions - Section 4.2 - The Natural Exponential Function - 4.2 Exercises: 30

Answer

$D(20)\approx 1.6$ ft

Work Step by Step

We are given: $D(t)=\frac{5.4}{1+2.9e^{-0.01t}}$ We plug in $t=20$ years: $D(20)=\frac{5.4}{1+2.9e^{-0.01*20}}\approx 1.6$ ft
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