Caffeine is present in coffee, tea, chocolate, and other foods and beverages. This chemical is eliminated from the human body over time. The table shows the mass of caffeine remaining in an average-sized person after drinking a cup of coffee containing 130 mg of caffeine. Time Amount a) Write an exponential relation to model the problem. (2 marks) (hours) of Caffeine (mg) 130 1 113.1 2 98.4 85.6 74.5 64.8 56.4 b) How much caffeine is left in the body 10 hours after drinking the cup of coffee? (2 marks) 49.0 34567

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