After how many hours will there be 20 mg of
caffeine left in the teenager's body?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

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