You are attempting to radiometrically date a rock sample that you have found. You know that your sample contains 12.5mg of the Parent Isotope and 87.5mg of the Daughter Isotope. How many half lives has your rock sample gone through? If the half life of your Isotope is 4,500

years, how old is your sample?

Оа

1 half life

Db

2 half lives

uc

3 half lives

d

4,500 years old

9,000 years old

13,500 years old

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