Chemistry, 16.01.2020 00:31, pyromadestill

As potassium-40 decays, it becomes argon-40, as shown in the following graph.

potassium-40 has a half-life of approximately 1.25 billion years. approximately how many years will pass before a sample of potassium-40 contains one-fourth the original amount of parent isotope?
1.25 billion
2.5 billion
3.75 billion
5 billion

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As potassium-40 decays, it becomes argon-40, as shown in the following graph.

potassium-...