Aaron sets up tables and chairs at the fundraiser. as a gift for the guest he places one packet of seeds on each chair ar every table. he buys several additional seed packets that he will plant around the pond. he writes the following equation to show the total cost, y, for all of the seed packets he orders for x tables. how much chairs are at each table? y=0.39(8x + 30)

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)