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The air in a room with volume 180 m3 contains 0.1% carbon dioxide initially. Fresher air with only 0.05% carbon dioxide flows into the room at a rate of 2 m3/min and the mixed air flows out at the same rate.
Find the percentage of carbon dioxide in the room as a function of time t (in minutes).
What happens with the percentage of carbon dioxide in the room in the long run?
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