Answer
$$ +20,237\ ft$$
Work Step by Step
We are asked to write a signed number. Since we are told how far $\underline{above}$ sea level the mountain is, we use a positive sign. Doing this, the answer is:
$$ +20,237\ ft$$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - 9.1 Signed Numbers - 9.1 Exercises - Page 628: 7
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