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Population of town was 21000 in 1980 and it was 20000 in 1990. Assuming the population is decreasing continuously at a rate proportion to the existing population, estimate the population in 2010.

 Jul 21, 2020
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10 years

original pop 21000   decreases    continuously

21000 e-kt     when t = 10 years  pop = 20000

20000 = 21000 e-10k

k = .004879

 

 2010    t = 30               21000 e-.004879 (30)  = ~~ 18141 population in 2010

 Jul 21, 2020

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