1. The problem statement, all variables and given/known data A projectile is fired horizontally from a gun that is 45.0m above flat ground, emerging from the gun with a speed of 250m/s. How long does the projectile remain in the air? 2. Relevant equations unsure of what equation to use. 3. The attempt at a solution I tried to use t = Δx/Vox which didn't work because it gave me 45/250=.18 *The answer is 3.03 seconds in the back of the book.