PLEASE I NEED HELP RIGHT AWAY

Graph the following piecewise function. x^2+2 if -5

Sketch one cycle if the cosine function y=2cos2theta

Which letters from the table represent like terms? a and b b and c a and d b and d

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)