Answer: 5.5 years
Explanation:
The 6,000 parking capacity is the future value of the number of parking passes and the 4,356 is the present value.
Using the future value formula, you can find the number of periods it would take:
Future value = Present value * (1 + rate) ^ n
(1 + rate)^ n = Future value / Present value
n = In (Future value / Present value) / In ( 1 + r)
= In (6,000 / 4,356) / In ( 1 + 6%)
= 5.495 years
= 5.5 years