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15 December, 23:31

The radioactive element carbon-14 has half of 5750 years. A scientist determined that the bones from a mastodon has lost 56.6% of their carbon-14. How old were the bones at the time they were discovered?

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  1. 15 December, 23:56
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    Answer:7881 years

    Step-by-step explanation:

    You can use the equation

    fraction remaining = 0.5n where n is # of half lives elapsed

    n = ?

    fraction remaining = 1 - 0.612 = 0.388

    0.388 = 0.5n

    n = 1.37 = the # of half lives

    1.37 x 5750 yrs = 7881 years
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