A piece of wood is discovered in the Amazon with a 14C/12C that is 64.3% that of living organisms. How old is it?
I have no clue how to do this please help.
It is easier to help you if you use the same screen name.
You don't list the half life but step 1 is to determine k. That is
k = 0.693/t1/2
Then
ln(No/N) - kt
No = 100
N = 64.3
k from above
Solve for t
I used 100 and 64.3; you can use ANY number for No, then N is No*0.643