17. scrie cu cifre numărut
a) trei intregi si doua septimi.
b) zece intregi şi opt unsprezecimi:
c) o sută doi intregi şi două sutimi:
douăzeci şi trei întregi si trei douăsprezecimi.
plz ma ajutați urgent

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)