True or false. an exponential decay function represents a quantity that has a constant halving time.

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)

Ihonestly have no clue if it's each or none.

Mr. t has been dating his girlfriend for one year nine months and six days how many hours has mr. t been in a relationship