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hhanan:
The half-life of carbon-14 is 5,730 years. Suppose a fossil is found with 20 percent as much of its carbon-14 as compared to a living sample. How old is the fossil?
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Katrin369:
what do you thin we can eliminate?
hhanan:
the last one
Katrin369:
ok and are you sure these are the correct answer choices?
hhanan:
ya
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Katrin369:
ok
Katrin369:
what else can we eliminate?
hhanan:
a
Katrin369:
ok ya i think you can
Katrin369:
so what are we left with?
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hhanan:
c
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