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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 percent of 40ar and 40ca atoms. How many years old is this rock?

User Danielorn
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They Are 40k btw your welcome
User Htorque
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