How old is a piece of wood that has lost 90% of its carbon-14? I know that there is only a presence of 10% but don't know how to find the decay rate (k).
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Originally Posted by littlesohi How old is a piece of wood that has lost 90% of its carbon-14? I know that there is only a presence of 10% but don't know how to find the decay rate (k). 1. The half-life time of carbon-14 is 5730 years. 2. Use the equation: to calculate k, where A(t) is the present amount and the initial amount. 3. 4. Solve the following equation for t: Spoiler: I've got 19,035 years
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