Roxanne owns a business and assigns two of her employees their shifts. She assigns the first employee shifts in blocks of 2 hours, and she assigns the second worker shifts in blocks of 12 hours. If both workers must receive the same number of hours, what is the minimum number of hours each must be assigned?

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)