Identify the domain of the function shown in the graph. choices:

A. y 1.5
B XS 0
Cxis all real numbers
D-7sys?

please help will mark brainliest if you’re RIGHT and an extra 50 points :))

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)