4) A cooler contains ten bottles of sports
drink: four lemon-lime flavored, three
orange flavored, and three fruit-punch
flavored. Three times, you randomly grab
a bottle, return the bottle to the cooler, and
then mix up the bottles. The first time,
you get a lemon-lime drink. The second
and third times, you get fruit-punch

These question are hard can you me with answers

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)

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.