A hemispherical tank is filled with water and has a diameter of 19 feet. If water weighs 62.4 pounds per cubic foot, what is the total weight of the water in a full tank,
to the nearest pound?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

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)