the graph shows the number of ice cream treats a street vendor sold one week.
what is the best estimate for the difference in the number of ice cream treats sold from monday to wednesday?

a) about 80 fewer
b) about140 fewer
c) about 80 more
d) about 140 more

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)