Answer:
The distance travelled by ball is 98 units before it again reaches the same height from which it was thrown.
Step-by-step explanation:
The given parabolic equation is

Where, h is height of ball after covering x distance horizontally.
Put x=0, to find initial height of the ball.



Put y=5.5 in the given equation and find the values of x at which the height of ball is 5.5.




Take square root both sides.



The height of ball is 5.5 at x=0 and x=98.
Therefore distance travelled by ball is 98 units before it again reaches the same height from which it was thrown.