Answer
3.9 miles
Work Step by Step
We know that the atmospheric pressure is given by:
$P=14.7e^{-.21x}$
We are asked to find when the pressure is 7.5.
$6.5=14.7e^{-.21x}$
We now find:
$-.21x=ln(6.5/14.7)$
This gives:
3.9 miles
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 9 - Section 9.8 - Exponential and Logarithmic Equations and Problem Solving - Exercise Set - Page 591: 58
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