math
posted by joe .
if a rectnagular prism has a height of h, the, width of the prism is six less than h and the length of the prism is one fourth of the length, find an equation for the volume of the rectangular prism in therms of h

How can the length be one fourth of the length? (Unless both are zero?)
You evidently copied the problem incorrectly. The length is either 1/4 of the width or 1/4 of the height.
Figure out which it is and write an expression for height*width*length in terms of h.