4. A rocket is launched with an initial vertical velocity of 110m/sec. The height of the rocket in meters is approximated by the quadratic equation h = -5t2 + 110t where t is the time after the launch
in seconds.
About how long does it take (in seconds) for the rocket to return to the ground? (Hint; Draw a
picture of the parabolic flight of the rocket and solve for the zeros of the given quadratic equation.)