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OpenStudy (anonymous):
Half-life is the time it takes for half of a sample of a radioactive element to decay. The function M(t)=P(1/2)^t/h can be used to calculate the mass remaining if the half-life is h and the initial mass is P. The half-life of radium is 1620 years. a) How many years will it take until the laboratory has only 4 g of radium?
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