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11-03-2024
Mathematics

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The lifetimes of radioactive nuclei are independent and exponentially distributed. The half-life is given by t₁/₂ = ln(2)/λ , where t₁/₂ is the time such that the expected fraction of atoms remaining is (1)/(2) . (a) Iodine-131 is radioactive, with a half-life of 8.02 days. What is the probability that a single atom of Iodine-131 is still un-decayed after 20 days?

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