The surface area of a polyhedron can be found by: A. multiplying the perimeter of the base by the height and adding the area of both bases.
B. adding the lateral surface area to the height C. multiplying the perimeter of the base by the length and adding the lateral surface area.
D. adding the total volume to the area of one of the bases.

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)