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A radioactive isotope has a half-life of 1.3 billion years. After 3.9 billion years how much of the parent material will be left?
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A radioactive isotope has a half-life of 1.3 billion years. After 3.9 billion years how much of the parent material will be left?

User ReAl
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1 Answer

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Hey there!

1/8 will be left of the parent material

Hope this helps!
User Redbandit
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