A model rocket is launched from the ground. Its height in feet is described by the equation t seconds after launch. When does the rocket hit the ground?
A) 0 sec
B) 5.625 sec
C) 0 or 5.625 sec

Question

A model rocket is launched from the ground. Its height in feet is described by the equation  t seconds after launch. When does the rocket hit the ground?
A) 0 sec 
B) 5.625 sec 
C) 0 or 5.625 sec

Quizplus · Accepted Answer

The rocket will hit the ground when its height is equal to 0 feet. So we need to solve the equation 11ec19db_8527_7381_9dbe_ddb4b93b2c0f_TBX8673_11 = 0. This can be done by setting t = 5.625 seconds. Therefore, the rocket hits the ground after 5.625 seconds.

A Model Rocket Is Launched from the Ground