### Home > CALC > Chapter Ch8 > Lesson 8.1.1 > Problem 8-9

8-9.

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)):