Paraceratherium was the biggest land mammal there has ever been. it lived about 35 million years ago and was 8 m tall and 11 m long. it looked like a giant rhinoceros but had a long neck like a giraffe. about how tall was paraceratherium in feet? use the conversion factor 1 ft. = 0.3048 m. round to the nearest tenth where necessary.

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)