Algebra and Trigonometry 10th Edition

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

Chapter 5 - 5.5 - Exponential and Logarithmic Models - 5.5 Exercises - Page 408: 57


$3: 00 \ am$

Work Step by Step

$t=-10 \ln \dfrac{T-70}{98.6-70}$ We are given the model: $T=85.7$ $t=-10 \ln \dfrac{85.7-70}{98.6-70}$ or, $t=-10 \ln \dfrac{15.7}{28.6}$ or, $t \approx 6$ The person died 6 hours before 9:00 am. Our answer is: 3: 00 am
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