Homework Help: math

Posted by jefferson on Wednesday, November 16, 2011 at 10:42pm.

In 1980, the population of a certain country was about 161 000. since then the population has decreased about 1% per year.
a. find an equation to model the population since 1980
b. estimate the population in 1990
c. suppose the current trend continues. predict the population 2000.

math - Reiny, Thursday, November 17, 2011 at 12:48am
P(t) = 161000(.99)^t, where t is the number of years since 1980

b) evaluate for t = 10

c) evaluate for t = 20

(time to update your textbook)

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