A 12,000-liter cistern is empty when water begins flowing into it (at t = 0) at a rate (in L/min) given by Q'(t) = 18/f, where t is measured in minutes. a. How much water flows into the cistern in 1.25 hours? b. Find the function that gives the amount of water in the tank at any time t20. c. When will the tank be full?

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