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22 March, 23:59

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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  1. 23 March, 03:36
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    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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