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. If fossil X had an original mass of 600 grams of Carbon-14, and now only has 9.375 grams of Carbon-14, how old is this fossil? (Enter your answer as only a number with comma(s) where needed- do not add years old, yr. old, etc... only the number)
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. If fossil X had an original mass of 600 grams of Carbon-14, and now only has 9.375 grams of Carbon...
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