Harriet counts 15 big boxes and 12 small boxes of notebooks. each large box contains 189 notebooks, and each small box contains 79 notebooks. estimate the total number of notebooks. is your estimate an overestimate or an underestimate? explain why it is better to have an overestimate than an underestimate.

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)