One angle of a parallelogram measures 140. What are the measures of the other three angles in the parallelogram

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)

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Can someone me and explain..will award brainlest!