Does the parabola with equation x2 + 5x +9=0 have real or imaginary roots?

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.

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Write each rational number in the form a/b, where a and b are integers. 1. 5 1/6 2. -12