Home > CALC > Chapter 8 > Lesson 8.1.1 > Problem8-9

8-9.

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

1. What was the stamp worth in the year 2000?

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

$250·1.12^{11} = 869.64$

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

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