Question: A window with a 20-foot perimeter (frame) is to be comprised of a semicircular stained glass pane above a rectangular clear pane, as shown in
A window with a 20-foot perimeter (frame) is to be comprised of a semicircular stained glass pane above a rectangular clear pane, as shown in the accompanying figure. Clear glass costs $3 per square foot and stained glass costs $10 per square foot. Express the cost of the window as a function of the radius of the stained glass pane.

2x X y
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