SOLUTION: The population of a southern city follows the exponential law. If the population doubled in size over 21 months and the current population is 30,000​, what will the population b

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Question 1171100: The population of a southern city follows the exponential law. If the population doubled in size over 21 months and the current population is 30,000​, what will the population be 5 years from​ now?
Found 2 solutions by ikleyn, Boreal:
Answer by ikleyn(52778)   (Show Source): You can put this solution on YOUR website!
.

    P(t) = 30000*2^((5*12)/21) = 217374.     ANSWER


In the formula, "5" denotes the number of years;  "12" denotes the number of months in the year,

and the fraction    is the number of doubling periods.

Solved.

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Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
60 months/21 months/doubling is 2 6/7 doublings.
2^2(6/7)=2^20/7 doublings=7.2458
without rounding, multiply by 30000=217,374 to nearest person.
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