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Geography, 22.06.2019 07:00
Explain why components that are naturally found in air can be considered air pollutants.
Answers: 3
Geography, 22.06.2019 07:40
Which of the following statements about the migration of workers to other countries is false?
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Geography, 22.06.2019 14:40
Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite
Answers: 2
Mathematics, 21.07.2019 14:00
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