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OpenStudy (anonymous):
The half-life of plutonium-234 is 9 hours. If 40 milligrams is present now, how much will be present in 4 days? Q(t)=Q0e^-rt I got as far as Q(4)=40e^-3/4(4) but I'm not sure that is even right or what do do with it now
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OpenStudy (anonymous):
plug into a calculator and just solve
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