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r-ruslan [8.4K]
2 years ago
5

Potassium-40 has a half-life of 1.3 billion years. If a rock was

Biology
2 answers:
Maksim231197 [3]2 years ago
5 0

Answer: The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.

pogonyaev2 years ago
3 0
The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
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