(7) In this problem volume is measured in cubic meters m³. A tank has a rectangular base that measures 2 meters by 5 meters and it has vertical sides. Initially it contains 150 m³ of red paint and 140 m³ of blue paint. Blue paint is entering the tank so that after t hours it enters the tank at a rate of (60t+20) m³/hr simplify your answers so there are no parentheses (a) How many cubic meters of blue paint are in the tank after t hours? (b) How quickly is the height of the paint in the tank rising after t hours? (c) How many hours until there is twice as much blue paint in the tank as red paint? (d) What is the average height of the paint in the tank during the first 2 hours ? m/hr hrs m

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