It has to be 12. I mulitplied 8 x 1.5
It likely hit a barrier like a wall for example and the force of the ball hitting the wall caused it to be pushed away. Another possibility is that the ball was kicked up some sort of slop and when it was at the ten feet it slowed down and then rolled back down. I hope this helps.
Answer:
The answer is "25".
Step-by-step explanation:
Please find the graph in the attachment.

Calculating the triangle two other sides:

let
