Each year the growth factor will be (p+0.12p)/p=1.12 where p is the population at the beginning of a particular year. Therefore, after n years the growth is 1.12ⁿ. So the population will increase to 1.12ⁿp where p is the initial population.

If p=5000 and n=15 the increased population will be 1.12¹⁵×5000=27368 approximately.

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