Answer
$2.75$ dollars.
Work Step by Step
For a $5.5\ min$ call, we have $\lfloor {5.5}\rfloor=5$, thus $f(5.5)=0.40(5)+0.75=2.75$ dollars.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 2 - Graphs and Functions - Quiz - Page 277: 5
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