Answer
4
Work Step by Step
7009 ft has 2 non-zero digits and 2 zeroes that are significant because they are between non-zero digits. Thus, there are 4 significant digits.
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 4 - Section 4.1 - Approximate Numbers and Accuracy - Exercise - Page 163: 3
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