HELP I WILL MARK BRAINLIEST Andrew works at a local pizza shop. The amount of money he makes is based on the number of hours he works. Which of the following represents the independent
variable?

the amount of pizzas Andrew makes while he is working

the amount of money Andrew makes

the amount of hours
Andrew works

the time it takes Andrew to travel to work

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)