A certain element has a half life of 2.52.5 billion years. a. You find a rock containing a...

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Basic Math

A certain element has a half life of
2.52.5
billion years.
a. You find a rock containing a mixture of the element and lead.You determine that
55?%
of the original element? remains; the other
9595?%
decayed into lead. How old is the?rock?
b. Analysis of another rock shows that it contains
6060?%
of its original? element; the other
4040?%
decayed into lead. How old is the? rock?

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4.2 Ratings (692 Votes)

The formula for computing the decay in a radioactive substance is Nt N0 ekt or NtN0 ektwhere N0 is the initial quantityNt is the quantity after t years and k is the constant of decay See Answer

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A certain element has a half life of 2.52.5 billion years. a. You find a rock containing a...

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Basic Math

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