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OpenStudy (anonymous):
uranium decays very slowly with a half life of 4.47 years. what percentage of a sample of uranium would remain after 13.4 billion years?
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OpenStudy (anonymous):
number of decays = time / half life n = 13,400,000,000 / 4.47 n=2,997,762,864 so the percentage remaining will will 100 x .5^n
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