posted by BeeBee .
The cost of manufacturing a semi-circular window is the cost of the glass pane together with the cost of the framing material. When ordering this window, a customer specifies the length of the base of the window, shown as l.
b. Write a function named k that relates the area of the glass pane to the length of the base of the window.
k = 1/2 π(l/2)^2 = π/8 l^2