Answer
$r= 1-\frac{C}{S}$
Work Step by Step
$S=\frac{C}{1-r}$
Solve for $r$
$S(1-r)= C$
$S-Sr=C$
$S-C=Sr$
$\frac{S-C}{S}=r$
or
$r= 1-\frac{C}{S}$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 1 - Equations and Inequalities - Exercise Set 1.3 - Page 135: 70
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