I think of a number. When I round my number to the nearest 100 it is 300. When I round it to the nearest 10 it is 250

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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)

2x minus y equals 6, x plus y equals negative 3