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8-9.
  1. The value of a rare stamp was $250 in 1989. The stamp has increased in value by 12% each year. Homework Help ✎

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

    2. 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.

250·1.1211 = $869.64

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