For this case, we have a function of the form:
[tex]y = A * (b) ^ t
[/tex]
Where,
A: initial amount
b: decrease rate
t: time in years
Then you have the following inequality:
[tex]9400 * (0,857) ^ t \ \textless \ 6000[/tex]
Answer:
An inequality that can be used to determine after how many years, t, will change the tax status of cities is:
[tex]9400 * (0,857) ^ t \ \textless \ 6000[/tex]
