Help me pls What’s 9+10
Wrong answer only free points :) if you report I will find you andyou

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)

Pls the last one and it has to be like number 6

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?