[quote=xxBUBBLiExx]7. A firecracker tossed into the air at 60* with the horizontal at a speed of 30 m/s exploded 15m away. How long was the firecracker in the air before it exploded? How high did it go?[/quote] Hey Girl! :3 I searched in the internet for answers and even some of my friends. Here's one of their answers. For Altitude: 15/sin60 if the distance is the horizontal distance. if distance is along the 60 degree then 15sin60 as for how long the firecracker was in the air distance /velocity 15m/30m/s=1/2s :] Hope it helps.