Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 1 - Section 1.4 - Exponential Functions - 1.4 Exercises - Page 55: 36

Answer

$P = 80.8498 \cdot (1.0127^t)$ According to the model, the estimate of the population in 1925 is $~~111~million$ According to the model, the estimate of the population in 2020 is $~~368~million$

Work Step by Step

Let $t$ be the number of years after 1900. When we input the data from the table from $t = 0$ to $t = 110$, the exponential regression function returns the following equation: $P = 80.8498 \cdot (1.0127^t)$ We can estimate the population in 1925: $P = 80.8498 \cdot (1.0127^t)$ $P = 80.8498 \cdot (1.0127^{25})$ $P = 111$ According to the model, the estimate of the population in 1925 is $~~111~million$ We can estimate the population in 2020: $P = 80.8498 \cdot (1.0127^t)$ $P = 80.8498 \cdot (1.0127^{120})$ $P = 368$ According to the model, the estimate of the population in 2020 is $~~368~million$
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