Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition

Published by Brooks Cole
ISBN 10: 1-43904-957-2
ISBN 13: 978-1-43904-957-0

Chapter 2 - Describing Change: Rates - Review Activities - Page 185: 2

Answer

Due to consumers and businesses detecting and resolving identity fraud more quickly, the total amount lost by victims of the fraud in the United States decreased by $12 billion. The percentage decrease was 20%. The average rate of change was 3 billion per year.

Work Step by Step

The change in the amount lost = 60 billion - 48 billion =12 billion The percentage change =$\frac{final value}{initial value}*100$ =$\frac{12000000000}{60000000000}*100$ =$\frac{1}{5}*100$ =20% Average rate of change per year =$\frac{totalchange}{duration of change}$ =$\frac{12000000000}{2008-2004}$ $\frac{12000000000}{4}$ =$3 billion
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.