#### Answer

$R(2.1)=15.430$
$R(-1)=33.333$

#### Work Step by Step

$R(2.1)=26(.78^{2.1})\approx 26(.593) \approx 15.430$
$R(-1)=26(.78^{-1})=\frac{100}{3}\approx 33.333$

Published by
Brooks Cole

ISBN 10:
1-43904-957-2

ISBN 13:
978-1-43904-957-0

$R(2.1)=15.430$
$R(-1)=33.333$

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