Question 288554: The half-life of radium is 1690 years. If 60 grams are present now, how much will be present in 440 years? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The half-life of radium is 1690 years. If 60 grams are present now, how much will be present in 440 years?
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A(t) = Ao*(1/2)^(t/1690)
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A(440) = 60*(1/2)^(440/1690)
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A(440) = 60*0.8349
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A(440) = 50.093 grams
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Cheers,
Stan H.
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