B.) The cylindrical oil tank shown below is half full. Approximate the volume of oil. Round two decimal places. 7 ft
5 ft
Approximate volume of the oil:

Find the area of the regular hexagon if a side is 20 cm.

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)

State one method by which you can recognize a perfect square trinomial.