AP Macroeconomics students were given an exam on a particular topic. Each week, they were tested with a comparable exam on the same topic and the average score for the class was measured. The function M (t) = 80 – 20log(t + 1) models the average score for the class after t weeks. How many weeks will it take for the average score of the class to equal 60? 8 weeks

9 weeks (the answer)

10 weeks

11 weeks

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.