A ball is thrown upward with its height given by the equatio...

Question Analysis
This problem assesses the application of the quadratic formula to a real-world scenario.

Key Concept Explanation
The quadratic formula is used to solve for the roots of a quadratic equation. In this context, the roots represent the times when the ball hits the ground.

Step-by-step Solution
1. Identify coefficients: , ,
2. Set the height to 0:
3. Apply the quadratic formula:
4. Simplify the discriminant: