Given that carbon-14 (C-14) has a half-life of 5,000 years, if we begin with 48 atoms of C-14, how many will remain after 15,000 years?

Question

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After 15,000 years, which is three half-lives of carbon-14 (5,000 years per half-life), the amount of C-14 would have halved three times. Starting with 48 atoms, after the first half-life, 24 would remain; after the second, 12; and after the third, 6.

Given That Carbon-14 (C-14) Has a Half-Life of 5,000 Years