Post a New Question

college math

posted by .

A quantity, W, is directly proportional to X and the square Y, and inversely proportional to the cube of Z. W=3 when X=4, Y=2 and Z=4. What is the value of W when X=8, Y=9 and Z= 6? Give answer to 3 decimal places.
Thanks in advance! I appreciate all the help! :)

  • college math -

    if you know what direct and inverse variations are, then you know that

    w = kxy^2/z^3
    plug in w,x,y,z to get k:
    3 = k/16
    k=48 so,

    w = 48xy^2/z^3

    Now plug in the new x,y,z to get w, since we now know k.

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question