To find out how far the water balloon travels before it reaches the ground, we need to solve the equation:
\[ 0 = -x^2 + 12x \]
First, we can rearrange this equation to:
\[ -x^2 + 12x = 0 \]
Next, we can factor out \( x \):
\[ x(-x + 12) = 0 \]
This gives us two solutions:
- \( x = 0 \)
- \( -x + 12 = 0 \) → \( x = 12 \)
The first solution, \( x = 0 \), represents the starting point when the balloon is fired from the slingshot. The second solution, \( x = 12 \), gives us the point where the balloon hits the ground.
Therefore, the water balloon will travel 12 feet before it reaches the ground.