Radioactive Decay: Polonium-210 has a half-life of 140 days. Suppose a sample of this substance has a mass of 300 mg. (a) Find a function m(t) = m02 (− t h ) that models the mass remaining after t days. (b) Find a function m(t) = m0e −rt that models the mass remaining after t days. [Remember: r is the relative decay rate, and can be calculated from the half-life] (c) Find the mass remaining after one year. (d) How long will it take for the sample to decay to a mass of 200 mg?
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Radioactive Decay: Polonium-210 has a half-life of 140 days. Suppose a sample of this substance has...
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