30 points the scores of first-time players of a popular video game are recorded. the results follow a normal distribution curve. the mean is 12,388 points with a standard deviation of 953 points. what is the probability that a randomly selected player’s score is more than 11,950 points? a. 0.3228 b. –0.46 c. 0.1550 d. 0.6772

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)