The proportion of carbon 14 still present in a sample after t years is e–0.00012t.?

tonio494

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The proportion of carbon 14 still present in a sample after t years is e–0.00012t.?

Estimate the age of the cave paintings if the carbon with which they were drawn contains only 16.1% of its original carbon 14
 
q=Qe^(–0.00012t)
16.1% are only present
.161Q=Qe^(–0.00012t)
.161=e^(–0.00012t)
ln(.161) / (-.00012) = t
t= 15220 years
Answer.
 
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