Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 7 Exponential and Logarithmic Functions - 7.3 Use Functions Involving e - 7.3 Exercises - Problem Solving - Page 497: 55


Approximately $895$ million camera phones were shipped in $2002$.

Work Step by Step

$x=0$ in $1997$, $2002-1997=5$ years have passed, so $x=5$. $ y=1.28e^{1.31x}\qquad$...Substitute $5$ for $x$ in the given function $ y=1.28e^{1.31\cdot 5}\qquad$...simplify. $ y=1.28e^{6.55}\qquad$...use calculator to solve. $y\approx 895$
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