Me with this question. renee is making a scale diagram of her mp3 player. the length of her scale drawing is 8 inches, and the width is 14 inches. the actual length of the mp3 player is 4 centiimeters, and the width is 7 centimeters.

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)