Mathematics, 04.12.2019 06:31, AgentPangolin

Acertain element has a half life of 4.5 billion years. a. you find a rock containing a mixture of the element and lead. you determine that 60% of the original element remains; the other 40% decayed into lead. how old is the rock? b. analysis of another rock shows that it contains 5% of its original element; the other 95% decayed into lead. how old is the rock?

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Acertain element has a half life of 4.5 billion years. a. you find a rock containing a mixture of th...