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March 28, 2015

Homework Help: Math in Science

Posted by Janey on Thursday, November 7, 2013 at 5:25pm.

A rock containing a newly discovered fossil is found to contain 5 mg of an unstable form of potassium and 5 mg of the stable element formed from its decay. If the half-life of the unstable form of potassium is 1.3 billion years, how old is the rock? What can you infer about the age of the fossil?

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