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If there were 171 mg of caffeine in Jacob's body 1.36 hours after consuming the energy drink, how many mg of caffeine is in Jacob's body 2.36 hours after consuming the energy drink

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Answer:

Caffeine in blood at before 2.36 hours = 102.66 mg

Explanation:

Caffeine in blood after 1.36 hours = 171 mg

It has a half-life of 5 hours so,

Caffeine in blood at before 0 hours = 171/ 100 x [(1.36 / 5) x 100] + 171 = 217.5 mg

2.36 hours are 47.2% of 5 hours so,

Caffeine in blood at before 2.36 hours = (217.5 / 100) x 47.2 = 102.66 mg

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