Complete the corresponding k­map for the given the boolean function f= a'd+ac+b

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.

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?