SOLUTION: The half-life of radium 226 is 1620 years. If we start with 20 grams of the element; find a model for radium and then use the model to calculate how much will be left after 1000 ye

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: The half-life of radium 226 is 1620 years. If we start with 20 grams of the element; find a model for radium and then use the model to calculate how much will be left after 1000 ye      Log On


   

Question 334464: The half-life of radium 226 is 1620 years. If we start with 20 grams of the element; find a model for radium and then use the model to calculate how much will be left after 1000 years.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The half-life of radium 226 is 1620 years. If we start with 20 grams of the element; find a model for radium and then use the model to calculate how much will be left after 1000 years.
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A(t)= Ao*(1/2)^(t/1620)
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A(1000) = 20*(1/2)^(1000/1620)
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A(1000) = 20*(1/2)^0.6173
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A(1000) = 20*0.6519
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A(1000) = 13.0379 grams
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Cheers,
Stan H.
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