the different kinds of beads Casey is using to make purses come in packages of 3 and 9. What is the least number of each kind of bead Casey can buy to have an equal number of each of the different kinds of bead? PLEASE ANSWER ASA

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)