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Acircular hot tub located near the middle of a rectangular patio has a diameter of 48 inches. the patio measures 11 feet by 6 feet. what is the area of the patio that is not covered by the hot tub?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?