Answer
${{\$}} 27.73$ billion
Work Step by Step
In order for the income to be equal to $1000$ (million), we solve for $S$:
$ 1000=44S-220\qquad$
$1220=44S$
$S=\displaystyle \frac{1220}{44} \approx 27.73$ billion
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 1 - Section 1.4 - Linear Regression - Exercises - Page 103: 21c
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