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A certain element has a half life of 3.5 billion years. You find a rock containing a mixture of the element and lead. You determine
A certain element has a half life of 3.5 billion years.
You find a rock containing a mixture of the element and lead. You determine that 60% of the original elementremains; the other 40% decayed into lead. How old is therock?
Q/Q0 =(1/2) t/T half
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