Jamelle stands at the window of a building 6.2 m above ground level. She throws her keys straight out of the window (horizontally) and hopes that her friend Rochelle, who is standing 10.4 m out from the base of the building, will catch them. Ignoring air resistance and using g = 10m/s^2 for the acceleration due to gravity, find the speed at which Jamelle needs to throw her keys, correct to 1 decimal place.
