Question 243211
a) width = w ___ depth = w ___ girth = 4w
___ length = 106 - 4w
___ volume = width * depth * length = w * w * (106 - 4w) = 106w^2 - 4w^3


b) see graph


{{{ graph( 400, 400, -30, 30, -2000, 13000, -4x^3+106x^2) }}}