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30 October, 02:20

Radioactive isotopes can be used to find the age of rocks, fossils, or other artifacts. Carbon-14 has a half-life of 5,730 years. Suppose a sample of charcoal from a primitive fire pit contains one eighth of its original amount of carbon-14. How old is the sample?

A. 716 years

B. 17,190 years

C. 22,920 years

D. 45,840 years

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  1. 30 October, 04:52
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    1/8 of carbon-14 which means it divided ... 3 times

    1/2 x 1/2 x 1/2 = 1/8

    3 x 5730 = 17190 years old
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