Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 5 - Exponential and Logarithmic Functions - 5.3 Exponential Functions - 5.3 Assess Your Understanding - Page 284: 115


a)$0.0516.$ b)$0.0888.$

Work Step by Step

a) If $P(x)=\frac{20^xe^{-20}}{x!}$, then if $x=15$, $P(15)=\frac{20^{15}e^{-20}}{15!}=0.0516.$ b) If $P(x)=\frac{20^xe^{-20}}{x!}$, then if $x=20$, $P(20)=\frac{20^{20}e^{-20}}{20!}=0.0888.$
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