## College Algebra 7th Edition

Published by Brooks Cole

# 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

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.