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Mathematics 14 Online
OpenStudy (anonymous):

please help me

OpenStudy (anonymous):

Plutonium-240 decays according to the function \[Q(t)=Q _{o}e ^{-kt}\]where Q represents the quantity remaining after t years and k is the decay constant, 0.00011... How long will it take 27 grams of plutonium-240 to decay to 9 grams?

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