la. A sample is brought into the laboratory and the chemist determines the percentage of the parent isotope remaining is 12.5% of the original amount. If the half-life of the material is 600 million years, how old is the sample? Lyears 1b. Determine the ages of a rock sample that contain a parent isotope with a half-life of 100 million years and have the following percentages: 50% Age:/ 25% Age:_ 6.25% Age:

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la. A sample is brought into the laboratory and the chemist determines the
percentage of the parent isotope remaining is 12.5% of the original
amount. If the half-life of the material is 600 million years, how old is the
sample?
Lyears
1b. Determine the ages of a rock sample that contain a parent isotope with a
half-life of 100 million years and have the following percentages:
50%
Age:/
25%
Age:_
6.25%
Age:
Transcribed Image Text:la. A sample is brought into the laboratory and the chemist determines the percentage of the parent isotope remaining is 12.5% of the original amount. If the half-life of the material is 600 million years, how old is the sample? Lyears 1b. Determine the ages of a rock sample that contain a parent isotope with a half-life of 100 million years and have the following percentages: 50% Age:/ 25% Age:_ 6.25% Age:
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