If the cost of the framing material is $ 13 per linear foot and the cost of the pane glass is $ 22 per square foot, what is the total cost of a window with a base length of 4 feet? round to the nearest penny.

Note that the framing material is per linear foot which means that it measures the perimeter of the window. So P(perimeter) = x(2b + 2h) where b is the base and h is the height and x is the cost/linear foot. The cost of the glass is per area and A(area) = ybh where y is the cost/foot^2. So the cost (C) of the window is: 

C = frame + glass
   = x(2b + 2h) + ybh
   = 13(2(4) + 2h) + 22(4)h
   = 13(8 + 2h) + 88h
   = 104 + 26h + 88h
   = 114h + 104  (if you are given the height then you can plug it in)

paul's with a y-intercept of $ 2856