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    Efrain's Avatar
    Efrain Posts: 1, Reputation: 1
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    #1

    Jul 10, 2009, 12:16 PM
    Solve
    The population of a certain country is growing at a rate of 2.3% per year. How long will it take for this country's population to double? Use the formula which gives the time, t, for a population with growth rate k, to double. (Round to the nearest whole year.)

    29 years
    30 years
    31 years
    32 years
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Jul 10, 2009, 12:20 PM

    For that one, use the same formula as for the one where I posted before.

    https://www.askmehelpdesk.com/math-s...ve-374090.html

    First, let for example the population be x.

    Just replace the Invested money by x. The total population should be 2x. Here, the 'n' which was in the previous formula becomes 't'. You just have to make 't' the subject of formula, then, solve for t.
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