Each of the letters in the word mathematics is represented by a letter tile in a bag. stacey picks three letters, without replacement. to the nearest whole percent, which is the probability that she'll get all vowels? 2%    3%    5%    6%any1 know the abswer

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)