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A scientist receiving a new sample of plutonium knows that the sample will not be of use to him after 80 percent of the radioactive material in the sample has disintegrated. if the half-life of this p
A scientist receiving a new sample of plutonium knows that the sample will not be of use to him after 80 percent of the radioactive material in the sample has disintegrated. if the half-life of this particular plutonium isotope is 124 days, for how many days after the sample arrives will the scientist be able to make use of the plutonium?