Football State University : $150 for 7 games University of Football : $200 for 8 games
Gridiron University : $175 for 6 games
Sports University : $125 for 4 games

Which university gives the best deal on football tickets?
URGENT PLEASE HELP!!!

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)