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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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Which describes italyโs mediterranean climate? a. moist in the summer and dry in the winter b. mild and wet all year round c. cool in the summer and warm in the winter d. hot in the summer and mild in the winter
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If the USA imported $1.8 trillion in 2016, but exported $1.2 trillion to other countries, what shoul...
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