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Steve LOVES coffee. Assume that caffeine levels in human blood serum decay according to the exponential decay model A(t)=A 0 e -kt . If Steve

Steve LOVES coffee. Assume that caffeine levels in human blood serum decay according to the exponential decay model A(t)=A0e-kt. If Steve instantly drinks a coffee, and all of the caffeine is instantly available in his blood serum, then find k given that:

After 1 hour, his blood serum caffeine level is 40mg/l; AND, after 1 hour and 40 minutes, his blood serum caffeine level is 10mg/l.

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