You drink a beverage with 120 mg of caffeine. Each hour, the caffeine in your system decreases by about 129 How much caffeine will be in your system after 2.hours? Do not round your answer.
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Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.