Question 2 (3 points)
VOCAB: Use the three terms below to fill in the blanks: (Be careful to spell them
correctly!)
combination
expected value
permutation
To find the
A multiply the probability
of each result times the numerical result itself and then add these all together. Use a
A to find the number of ways to select
objects from a set of n objects if the order you select them in matters. Use a
A if the order does not matter,

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)