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According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.
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Mathematics, 21.06.2019 17:00
An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?
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