Final answer:
The equation y = -5x^2 + 10x + 1.5 represents the path of the ball. To determine when the ball will be at 5m, set y equal to 5 and solve for x.
Step-by-step explanation:
The equation y = -5x^2 + 10x + 1.5 represents the path of the ball where y is the height and x is the time. To determine when the ball will be at 5m, we set y equal to 5 and solve for x:
5 = -5x^2 + 10x + 1.5
This is a quadratic equation which can be solved using various methods such as factoring, completing the square, or using the quadratic formula. Once the equation is solved, the values of x represent the times when the ball will be at 5m.