3. The cheetah is the world's fastest land animal. An adult cheetah can reach speeds of 28 meters per second. If a cheetah was traveling at a constant speed of 28 meters per second, how many meters would the cheetah run in 5 seconds?

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)