Advanced Placement (AP), 02.01.2020 22:31 tomasholguin

Radioactive decay of 40k in an igneous rock has resulted in a ratio of 25 percent 40k atoms to 75 percent of 40ar and 40ca atoms. how many years old is this rock?

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Radioactive decay of 40k in an igneous rock has resulted in a ratio of 25 percent 40k atoms to 75 pe...