Answer:
11.581 years
Step-by-step explanation:
Formula:

I am not 100% sure this is right but I believe its 28:)
If the question is 3*2/3=2+N/3
N=0
If the question is 2/3=2+N/3
N=-4
10 is the estimate because you have 58, and you put it in 589 10 times.