5. An um contains 50 marbles, 40 blue ones and 10 yellow ones
(a) What is the probability of drawing a blue
marble
(b) If 5 yellow marbles are removed from the
urn what is the chance now of drawing a
vellow marble

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)