Vehicle insurance would be most useful to a person who: O A. has a car stolen while on vacation.
B. performs dangerous work as a surgeon.
C. has to spend a week in a hosphal.
D. owns property where a pedestrian is hurt.

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)