A cup of green tea contains 35 mg of caffeine the average teen can aluminate approximately 12.5% of caffeine from their system per hour estimate the amount of caffeine in a teenagers body three hours after drinking a cup of green tea

amount of caffeine after three hours = 13.125 mg

Step-by-step explanation:

caffeine content n the tea = 35mg

amount ingested by teens per hour= 12.5% of caffeine = 12.5% of 35mg

= 12.5/100 × 35mg

amount ingested by teens per hour = 0.125 × 35 = 4.375 mg

∴ amount ingested by teens after three hours = 4.375 × 3 = 13.125 mg

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step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.