A school supply company produces wooden rulers and plastic rulers. The rulers must first be made, and then painted.
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[*]It takes 20 minutes to make a wooden ruler. It takes 15 minutes to make a plastic ruler. There is a maximum amount of 480 minutes per day set aside for making rulers.
[*]It takes 5 minutes to paint a wooden ruler. It takes 2 minutes to paint a plastic ruler. There is a maximum amount of 180 minutes per day set aside for painting rulers.
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Write a system of inequalities that models the constraints involved in the making and then painting of wooden and plastic rulers.
