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saw5 [17]
3 years ago
10

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?
Advanced Placement (AP)
1 answer:
kenny6666 [7]3 years ago
3 0
They Are 40k btw your welcome
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If the Civil War had begun as a war to restore the Union, how did this Proclamation changed the purpose of the war?
OlgaM077 [116]
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Answer:

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Explanation:

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<h3>What are FInancial Reforms?</h3>

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Learn more about Financial reforms here:

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