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unicorns110504
24.07.2019 •
Chemistry
Atank contains 210 liters of fluid in which 20 grams of salt is dissolved. pure water is then pumped into the tank at a rate of 3 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.
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Ответ:
sorry my friends
Explanation: