To find out how far the balloon will travel before it reaches the ground, we need to solve the quadratic equation given by setting the height \( h(x) = -x^2 + 12x \) equal to zero:
\[ 0 = -x^2 + 12x \]
We can rearrange this to:
\[ x^2 - 12x = 0 \]
Next, we can factor out \( x \):
\[ x(x - 12) = 0 \]
Setting each factor equal to zero gives us two potential solutions:
- \( x = 0 \)
- \( x - 12 = 0 \) → \( x = 12 \)
The solution \( x = 0 \) corresponds to the moment the balloon is fired from the slingshot, while \( x = 12 \) represents the point where the balloon reaches the ground.
Therefore, the balloon will travel 12 feet before it reaches the ground.