For the function {(0,1) (1,-3) (2,4)(-4,1)}, write the domain and range set? *If the value repeats you only have to list it once.

What is this inequality notation? t is less then or equal to 2

How to do this , and can some one explain

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)