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suter [353]
3 years ago
12

How many half-lives did the rock go through? 4. If a rock had 40 daughter atoms present, how old would the rock be?

Geography
2 answers:
MrRissso [65]3 years ago
5 0
160 I would say hope this helped
Nina [5.8K]3 years ago
4 0
160 should be the right answer
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