Answer
$y=20$
Work Step by Step
From the graph, the horizontal asymptote is:
$$y=20$$ It means, the temperature of the object approaches the room temperature of $20^\circ$ while cooling down.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 5 - 5.4 - Exponential and Logarithmic Equations - 5.4 - Page 397: 88a
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