Recall: The volume in cubic centimetres, V, of this box is given as V(x)
= 3x$^3$ + 24x$^2$ + 15x - 150.
Using your answer from the previous question, calculate the HEIGHT
of this box when the base area is equal to 100 square units.
A(x) = 100 therefore x = 5
therefore, the box's height at this x value is h(x) = 9