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