Abag contains 8 blue marbles, 6 red marbles, and 4 green marbles. what is the probability of selecting a blue marble, replacing it in the bag and then selecting a red marble?
a.7/9
b.1/3
c.2/27
d.4/27

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 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)