Question 99529
Remember, the volume of a box is 


{{{V=L*w*h}}}



Since the top is 6 by 3.5 inches, we know the length is 6 inches and the width is 3.5 inches



{{{105=6*(3.5)*h}}} Plug in L=6 and w=3.5, and the given volume V=105



{{{105=21h}}} Multiply



{{{5=h}}} Divide both sides by 21



So the height is {{{h=5}}}