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A tank contains 9,000 L of brine with 19 kg of dissolved salt. Pure water enters the tank at a rate of 90 L/min.

A tank contains 9,000 L of brine with 19 kg of dissolved salt. Pure water enters the tank at a rate of 90 L/min. The solution is kept thoroughly mixed and drain from the tank at the same rate. (a) How much salt is in the tank after t minutes? y = kg (b) How much salt is in the tank after 30 minutes? (Round your answer to one decimal place.) y= kg

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