15. Plutonium-239 is the isotope that is most often used in nuclear reactors, and has a half- life of 24,100 years. At the time

Question

15. Plutonium-239 is the isotope that is most often used in nuclear reactors, and has a half-
life of 24,100 years. At the time of the 1986 accident at Chernobyl, there were 10 pounds
of plutonium-239 on site.
a) Find an exponential model that gives the amount of plutonium 239 remaining after
t years.
b) How much plutonium remains after 100 years?
c) How much plutonium remains after 1000 years?

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