Question

A $810 washing machine in a laundromat is depreciated for tax purposes at a rate of $90 per year. Find a function

for the depreciated value of the washing machine as it varies with time. When does the depreciated value reach $0?

Answer 1

Answer: c=810-90t, t=9 years

Explanation:
This function can be modeled linearly because we know that the cost decreases by $90 every year. That means our cost is equal to the original value minus $90 for every year, which is t.
So, c=810-90t. And this function equals zero when t is equal to 9 years.