A store sells a box of highlighters that contains 40% yellow, 30% blue, 20% pink, and 10% green highlighter. What is the probability of randomly picking first 1 blue and then 1 pink highlighter from the box if the first highlighter is replaced?

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)