Awater tank has 22 gallons of water. it begins to receive 26 gallons per hour for a number of hours. if the tank needs to fill to at least 516 gallons, which of the following is the minimum number of hours the tank should continue filling? 5.2 19 20.7 23

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)