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?

Question

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

Emily · Answer

I got yeah! 40---> 20----> 10 5,730---> = 11,460 years