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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
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What factors britain to become an industrial and commercial power?
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These are the abiotic factor or biotic factors that restricts the numbers, reproduction, or distribution of organisms.
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How can place be used to interpret the past...
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