Position, Displacement, and Average Velocity (Problem 27)

The position of a particle moving along the x-axis is given by $x(t)=4.0-2.0t$ m. (a) At what time does the particle cross the origin? (b) What is the displacement of the particle between $\text{t}=3.0\text{s}$ and $\text{t}=6.0\text{s}?$ Select the answer to part (a).