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Chery Chery
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7 years ago
Today, uranium contains     (half-life = 0.70 billion years) and     (half-life = 4.5 billion years). At a time 1.9 billion years ago, what was the fraction of   in uranium?
A) 3.53%
B) 4.72%
C) 4.90%
D) 6.76%
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College Physics

College Physics


Edition: 1st
Authors:
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HotMathHotMath
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Chery Author
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#2
7 years ago
You're right again!

Appreciate it
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