The mass of a radioactive element decays at rate given by m (t) = m0e-rt, where m (t) is the mass at any time t, m0 is the initial mass, and r is the rate of decay.
Uranium-240 has a rate of decay of. 0491593745. What is the mass of U-240 left after 10 hours, if the initial mass is 50 grams? [Use e = 2.71828.]
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