in a competition an athlete throws a flying disk 139 meters through the air while it's in flight the disc traveled at an arranged speed of 13.0 m/s how long did the disc remain in the air

Ablue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.5 m/s 2 . a green car arrives at the position of the stop-light 6.5 s after the light had turned green. if t = 0 when the light turns green, at what time does the green car catch the blue car if the green car maintains the slowest constant speed necessary to catch up to the blue car? answer in units of s.