A roll of ribbon was 12 meters long Diego cut 9 pieces of ribbon that worked 0.4 meters each he then use the remaining ribbon to make some reefs each wreath you 0.6 meters how many wreaths could he make with ribbon he had left

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)