Benchmark 1 2021 I 8 of 50 11 Pause
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The carbon in all living things includes the common isotope carbon-12 as well as the radioactive isotope carbon-14. When an organism dies, it stops taking in carbon
The carbon-14 it contains breaks down into another element, while the carbon-12 it contains remains constant. Half of the atoms in a sample of carbon-14 decay every
5700 years. Thus, the half-life of carbon-14 is 5700 years. Measurements of a fossilized skull indicate that it has a carbon-14 carbon-12 ratio that is equal to about
that of the skulls of present-day animals. Approximately how old is the skul?
A 5700 years old
OB 11.400 years old
c. 17,100 years old
D. 22.800 years old