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A large tank contains 100 liters of a salt solution which has a concentration of 0.4 kilograms per liter. A salt solution which has a

A large tank contains 100 liters of a salt solution which has a concentration of 0.4 kilograms per liter. A salt solution which has a concentration of 0.55 kilograms per liter is added to the solution at a rate of 20 liters per minute. At the same time, the solution drains from the tank at 20 liters per minute.

1.) Find the amountSof the salt in the solution as a function oft:

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