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A standard serving of espresso contains 125 mg of caffeine. A person consumes one serving of...

A standard serving of espresso contains 125 mg of caffeine. A person consumes one serving of espresso at 8 am and two servings at 12 pm. Determine how much caffeine (in mg) remains in their body at 6 pm on the same day if caffeine is eliminated from the body via first order kinetics with a half- life of 6 hours.

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