The Height in Feet H of a Rocket in Flight $h = - 16 t ^ { 2 } + 224 t$

question 20

Multiple Choice

The height in feet h of a rocket in flight is given by the formula $h = - 16 t ^ { 2 } + 224 t$ , where t is the time of the flight in seconds. How long will it take for the rocket to hit the ground?

• A)13 sec
• B)14 sec
• C)16 sec
• D)12 sec
• E)11 sec