### Home > CALC > Chapter 8 > Lesson 8.1.1 > Problem 8-9

8-9.

The value of a rare stamp was $250 in 1989. The stamp has increased in value by 12% each year. Homework Help ✎

What was the stamp worth in the year 2000?

What is the average value of the stamp from 1989 to 2000?

The stamp is 112% of its value from the previous year.This will happen for 11 years in a row.

250·1.12^{11} = $869.64

If *f*(*t*) represents the value of the stamp as a function of time (the equation you used to solve part (a)):