Question

The value of a textbook is $69 and decreases at a rate of 15% per year for 11 years. Find the exponential function and find y

Answer 1

y = 69(0.85)ⁿ

after 11 years the value is $11.55

Write the exponential equation and find the value after the given time:

The value of a textbook is $69 and decreases at a rate of 15% per year for 11 years.