Line t is shown on the right side and n the coordinate plane what is the slope of the line t

The product of two negative rational numbers is always zero sometimes zero never zero

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)

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom