Ms. Jones wants to paint the walls of a rectangular room. The height of the
room is 8 feet. The floor is 10.5 feet wide and 12 feet long. The doors and
windows total 24 square feet and are not going to be painted. Find the total
area of the walls that need to be painted.
So the walls will have an area of
2(10.5*8) + 2(12*8) - 24
= ..... ft^2