Answer
21,120 ft
Work Step by Step
$4mi=4mi\times\frac{5280ft}{1mi}=21120ft$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 1 - Section 1.9 - The U.S. System of Weights and Measures - Exercises - Page 53: 12
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