On Saturday mornings, Zoe volunteers at the hospital where her mother works. One Saturday, she answers phone calls at the information desk while the receptionist is away.
Then she spends 20 minutes delivering flowers to patients' rooms. In all, Zoe volunteers at
the hospital for 60 minutes that day.

49xy +34y - 72z. determine the degree of the polynomial

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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)