You purchase 10.75 gallons of gasoline at 3.60 gallon. you buy a cookie 1.25 and windshield wiper fluid 4.97. the state has a food tax of 4%.you give the clek 20.00 and charge the rest on debit card. how much is charge on debit card

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)