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Home > CCG > Chapter 7 > Lesson 7.2.5 > Problem 7-99

7-99.

The principal’s new car cost but in three years it will only be worth . What is the average annual percent of decrease for the three year period? Homework Help ✎

Use the exponential function:

, ,

Solve for .

After you find “" convert it to a percent and subtract from to find the percent decrease.

Percent decrease is .