2. a stone is an english measure of weight. there are 14 pounds in 1 stone and 2.2 pounds in 1 kilogram. a certain person weighs 9 stone. (a) if you wanted to convert the person’s weight to kilograms, what conversion factor should you use? round the conversion to the nearest hundredth. show your work. (b) what is the person’s weight in kilograms rounded to the nearest tenth?

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)