Answer
(a) $C=20-10h$
(b) We can expect $-30°C$
Work Step by Step
Let $C$ be temperature for given height $h$.
$20°C$ is a ground temperature at $h=0$
(a) Note, $h$ is in kilometers.
$C=20-10h$
(b) $h=5$
$C=20-10\times 5=-30°C$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.8 - Inequalities - 1.8 Exercises - Page 90: 114
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