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A tank contains 2100 L of pure water. Solution that contains 0.05 kg of sugar per...

A tank contains 2100 L of pure water. Solution that contains 0.05 kg of sugar per liter enters the tank at the rate 4 L/min, and is thoroughly mixed into it. The new solution drains out of the tank at the same rate.

(b) Find the amount of sugar after t minutes.
y(t)=

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