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BlackZzzverrR [31]
4 years ago
12

A certain element has a half life of 4.5 billion years. a. You find a rock containing a mixture of the element and lead. You det

ermine 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?
Mathematics
1 answer:
Vitek1552 [10]4 years ago
8 0

Answer:

Step-by-step explanation:

8.5 billion years old is answer

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