A cannon ball is launched into the air with an upward velocity of 380 feet per second, from a 9-foot tall cannon. The height h of the cannon ball after t seconds can be found using the equation h=-16t2 +380t+9. Approximately how long will it take for the cannon ball to be 1846 feet high? Round answers to the nearest tenth if necessary. units: How long long will it take to hit the ground? units: Question Help: Message instructor