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chemistry

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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 -

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

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