There was a surplus of office space in a city, with 400,000 square feet, or 16% of the total office space, vacant. how much office space did the city have?

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.