College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Section R.5 - Rational Expressions - R.5 Exercises - Page 49: 81

Answer

$\mathrm{The\ cost\ of\ removing} \ 75\%\ \mathrm{of\ pollutant\ is} \ \$20,100$

Work Step by Step

$\begin{array}{l} \mathrm{To\ find\ the\ cost\ of\ removing\ 75\%\ of\ pollutant\ from\ the\ environment,\ set\ } x\mathrm{\ equal\ to\ 75}\\ (\mathrm{recall\ that\ the\ units\ of} \ x\ \mathrm{is\ thousands\ of\ dollars}) \ \mathrm{then} \ \mathrm{apply\ the\ cost-benefit\ model\ }\\ \mathrm{as\ follows} :\\ \begin{array}{ c l } y & =\dfrac{6.7( 75)}{100-75}\\ & \\ & =\dfrac{502.5}{25}\\ & \\ & =20.10 \end{array}\\ \\ \mathrm{The\ cost\ of\ removing} \ 75\%\ \mathrm{of\ pollutant\ is} \ \$20,100 \end{array}$.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.