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Carbon-14 has a half-life of about 5,600 years. Archaeologists analyze a piece of wood found at an ancient village site and determine that, of he initial 100 grams of Carbon-14 in the wood, onl 3.125 grams are left. How old is the wood?

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    take log both sides...

    log(3.125)=2+n/thlaf (log.5)
    so solve for n, then grab you calculator and have fun.

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