Homework Help: chemistry

Posted by Connie on Wednesday, October 19, 2011 at 1:59pm.

A wooden object from a prehistoric site has a carbon-14 activity of 10 counts per min.(cpm) compared to 40 cpm for new wood. If carbon-14 has a half life of 5730 years what is the age of the wood?

Please get me started. Thank you

chemistry - Emily, Wednesday, October 19, 2011 at 2:08pm
I got yeah!
40---> 20----> 10
5,730---> = 11,460 years

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