1.A ball is thrown straight up from the second floor of a building. The height of the ball can be modeled by h (t) = -412 + 12+ + 16, where h is the height of the ball in feet after seconds.
Determine the maximum height of the ball and the time at which the ball reaches this height. Use mathematics to justify your answer.
Include proper units.
2. Determine the length of time the ball was in the air. use mathematics to justify your answer. Include proper units.

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

If set d is not the empty set but is a subset of set e, then which of the following is true? d ∩ e = d d ∩ e = e d ∩ e = ∅