Plsss i need help Ms. Jamieson compared the math test scores of her streak her morning and afternoon classes. Which statement is true?

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)

Can you me find the slope! (30 points)

Which strategy is used by public health to reduce the incidence of food poisoning?