Answer
$4$
Work Step by Step
The formula for the distance between two numbers is $|a-b|$.
Thus, we have $|-2.5-1.5|=|-4|=4$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.2 - Real Numbers - P.2 Exercises - Page 16: 74
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