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Mathematics, 10.04.2020 04:54 emmeaw245

Question: Carbon-11 has a half-life of about 20 minutes. If we start with 200 grams, how
much will be left after 3 hours?

A. 25 grams
B. 2.5 grams
C. 0.39 grams
D. 0.039 grams

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