Mrs. J wants to find the best deal on a new Harley. The matrix shows the prices of three different models (rows) with four different dealers in her area (columns). The sales tax in her region is 7%. Which matrix A - D shows the final price of each bike including sales tax.

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)