Plz help me one hour left to answer this math

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

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)