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You drink a beverage with 120 mg of caffeine. Each hour, the caffeine in your system decreases by about 12%. How many milligrams of caffeine will be in your system after 8 hours? Round to two decimal places.

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amna04352

Answer:

42.16 mg

Step-by-step explanation:

Decrease by 12% means 88% of the previous (100-12 = 88)

Every hour, caffeine is 0.88 times the previous

After 8 hours,

120 × (0.88)⁸ = 43.156 mg

= 43.16 mg

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