Vicky did a survey to answer the following question: what is the average fitness score of grade 8 students? the mean fitness score was 3.2 points. if all the students scored the same, what would be the fitness score of each student?
a. cannot be determined
b. greater than 3.2 points
c. less than 3.2 points
d. 3.2 points

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)