The field inside a running track is made up of a rectangle that is 84.39 m long and 73 m wide, together with a half-circle at each end. The track is 9.76 m wide all the way around. What is the distance around the outside of the track? Use 3.14 for pi in your calculations and round to the nearest whole number

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)