You are in an elevator on the seventh floor. You go down 4 floors, and then up 8 floors.
Then you go down 3 floors and up 9 floors.
The elevator goes down again, and you get
off. According to the pattern, on which
floor are you now?

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)

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Answer asap! urgent! will give brainliest!