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Thread: Word Problem. NEED HELP!

  1. #1
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    Cool Word Problem. NEED HELP!

    On the planet Maximillian live Sprogs and Graks. Initially there were 800 sprogs and 100 Graks. The population of Sprogs doubles every 6 years and that of Graks doubles every 3 years.
    a) How many Graks were there after 112 years?


    b) When are there as many Sprogs as Graks?

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  2. #2
    Newbie Cervesa's Avatar
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    Re: Word Problem. NEED HELP!

    let $S(t)$ be the population of Sprogs as a function of time in years
    let $G(t)$ be the population of Graks as a function of time in years

    $S(t) = 800 \cdot 2^{t/6}$

    $G(t) = 100 \cdot 2^{t/3}$

    see what you can do to answer the questions with these two functions
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