mei is knitting a scarf with diagonal stripes before she began she laid out the pattern on a coordinate grid where each unit represented 2 inches. On the grid the first stripe began at (2,0) and ended at (5,4). All the stripes are the same length. How many inches long is each stripe on the scarf?

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)