Question

I need help,Please!
An pathropologist studying the bones of a prehistoric person finds there is so little remaining Carbon-14 in the bones that instruments cannot mesure it .This mean that there is less than 0.5% of the amount of the amount of Carbon-14 the bones would have contained wnen the person was alive .How long ago did person die?
the key is more than 44.000 years ago

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Answer 1

The key is not "more than 44.000 years ago." The key is to find, through a straightforward google search, the half-life of C-14, which is 5730 years.

We have A(t)=A0*(1/2)^(t/5730)

0.0005A0=A0*(1/2)^(t/5730)

(1/2)^(t/5730) = 0.0005

Take the ln of both sides:
(t/5730)ln(1/2) = ln(0.0005)
t/5730 = 10.9658
t is approximately 62,833.94 (years ago).

Answer 2

ty

Answer 3

can you help me one more?

Answer 4

I will post another page