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16-04-2021
Physics

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Calculate the amount, in grams, of an original 300 gram sample of potassium 40 remaining after 3.9 billion years.
a. 300
b. 150
c. 75
d. 37.5

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jeremdkdkdkmd jeremdkdkdkmd

17-04-2021

71718 88.
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