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How long will it take for the population of a certain country to double if its annual growth rate is 1.5%? Round to the nearest year. Use the exponential growth model P(t) = P0e^kt.

  • Algebra -

    2 = 1(e)^.015t

    ln 2 = ln e^.015t
    .015t = ln2
    t = .693147/.015
    = 46.2

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