Answer:
6.69
Explanation:
The equation is:
y=12000(1.04)^x
To solve, set y equal to 15600 and solve for x (I used a calculator)
15600=12000(1.04)^x
x=6.69
It will take 7.5 or 7 and a half years for the population to reach 15,600!
4% of 12000 is 480!
15600-12000 is 3,600!
3,600/480 is 7.5
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