How many years it would take for the population to reach 12,000?

Question

Po=1,000+1,500*sqrt(t) ....t stands for years show your work please

Answer 1

What's the starting point?

Answer 2

12 000 = 1 000 + 1 500 x sqrt. (t)

11 000 = 1 500 x sqrt. (t)

7.3333 = sqrt. (t)

t = 53.78 years?

Answer 3

About 1 second if you collided with the right asteroid

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Answer 4

The population of where, and by which or whom? Even if the number were sensible, it seems to me ludicrous that the question could be answered by math alone.