math 213
posted by billy bob .
The effect of depreciation can be computed using a formula similar to the formula for compound interest.
a. Assume depreciation is the same each month. Write a problem involving depreciation and solve it.
b. Develop a general formula for depreciation defining what each variable in the formula stands for.

This is not straight line depreciation but a constant percentage depreciation per month.
let value after a month be d times value the month before. (like 0.97 or something)
Then value after n months = original value * d^n
for example if I buy a $500 appliance
and d = .97 per month
then after 2 years
value = 500(.97)^24
= 500(.481)
= $ 241
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