Can someone help me out please

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)

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?

Quickly multiply and simplify polynomials (x – 4) (x^2 – 5x – 6)