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.
+36916 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
