Prove that segment de is parallel to segment ab.

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)

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set