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History, 19.02.2020 00:23 mikewalton566
Calculate the total number of years that each of the geologic eras lasted, rounding to the nearest 100 million. Then, calculate each of these values as a percentage of the total 4.6 billion years of Earth's history. Round your answer to the units place.
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Calculate the total number of years that each of the geologic eras lasted, rounding to the nearest 1...
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