Write a number with the digit 8 in the tens place

Solve the inequality, then identify the graph of the solution. 2x – 1 > x + 2

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)

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?