Question 262848
What you have looks good. Even though the intitial velocity is 64ft/sec, after one second the rocket would be only 64 ft high in the absence of gravity. So it makes sense that after one second, with gravity, it would be less than 64 feet high. After two more seconds (that is at t=3) the rocket has reached its high point and is descending. The rocket's path is a parabola and so there are two times when the rocket is at 48 feet, once on the way up and once on the way down again.