Answer
$$12.7\ ft
.$$
Work Step by Step
Since we have the same units, then the total length of the pieces is
$$
3.32 \ ft+ 2.15\ ft+ 3.2\ ft+ 4.0 \ ft= 12.67\ ft \approx 12.7 ~ft
.$$
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 4.5 - Addition and Subtraction of Measurements - Exercise - Page 185: 45
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