A tank contains 1000L of brine with 25kg of dissolved salt. Pure water enters the tank at a rate of 15L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. Answer the following questions correctly. 1. How much salt is in the tank after t minutes? Answer (in kg): S(t)=___________________ 2. How much salt is in the tank after 10 minutes? Answer (in kg):

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