Answer
km
Work Step by Step
A jet plane generally flies about 8–9 km high.
Choosing $m$ would be too small. Thus, we choose $km$.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 3 - Section 3.2 - Length - Exercise - Page 141: 31
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