### Home > CCA > Chapter 7 > Lesson 7.1.4 > Problem 7-48

7-48.

Assume that a DVD loses

What multiplier would you use to calculate the video’s new values?

0.40

What is the value of the DVD after one year? After four years?

Use your multiplier from part (a) to calculate these values.

Write a continuous function,

, to model the value of a DVD afteryears.When does the video have no value?

Let

in the equation in part (c).

Solve for. What happens?Sketch a graph of this function. Be sure to scale and label the axes.

Completed the table in the eTool below for part (e) of this problem.

Click on the link at right for the full eTool version: *7-48 HW eTool*