The probability that a birth will result in twins is 0.0190. assuming independence (perhaps not a valid assumption), what is the probability that out of 120 births in a hospital, there will be exactly 3 sets of twins?

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.