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Math Help - Direct & Joint Proportions

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    Direct & Joint Proportions

    Please help me answer this problem. Thank you so much

    If n is directly proportional to the cube of m and that n = 27 when m = 1 1/2, find:
    a) the value of n when m = 2
    d) the value of m when n = 125
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  2. #2
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    Re: Direct & Joint Proportions

    Quote Originally Posted by gellie View Post
    Please help me answer this problem. Thank you so much

    If n is directly proportional to the cube of m and that n = 27 when m = 1 1/2, find:
    a) the value of n when m = 2
    d) the value of m when n = 125
    n \propto m^3 \Rightarrow n = km^3.

    Use n = 27 when m = 1 1/2 to get the value of k. Then use your formula to answer a) and d).

    If you need more help, please show all your work and say where you're stuck.
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