2. Do quarterbacks have a greater Ability to complete passes when the weather is warm? To investigate, you compare the pass completion percentages for Donovan McNabb in games 50 degrees or warmer and in games under 50 degrees. State the null and
alternative hypotheses for investigating this claim.

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)