Algebra and Trigonometry 10th Edition

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

Chapter 1 - 1.2 - Linear Equations in One Variable - 1.2 Exercises - Page 88: 70c


Approximately $2020$, which seems reasonable.

Work Step by Step

Set $y=239$. Then $239=-2.6t+291.7\\239-291.7=-52.7=-2.6t\\t=\frac{-52.7}{2.6}\approx20.269$. Thus the population will be $239000$ in approximately $2020$, which seems reasonable.
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