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math

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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 -

    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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