Julie is selling candy bars to raise money for new band uniforms. candy bar x sells for $2 and candy bar y sells for $3. julie needs to sell at least three times more y candy bars than x candy bars. she has at most 36 candy bars to sell
according to the graph, which set of points represents all the vertices of the feasible region?

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)