Hey! can you help me with question number 2? I am really confused about it

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

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 graph shows the amount of money noah earned based on the number of lawns he cut. which list shows the dependent quantities in the graph?