19. The product of two consecutive positive integers is 42. Write and solve a quadratic equation to find the solutions. Then show how you use those solutions to find the two consecutive positive integers. 20. A cannonball is shot from a cannon on top of a hill that is 73.5 meters above sea level. The cannonball leaves the cannon with a velocity of 9.8 m/s. Write and solve a quadratic equation to determine when the cannonball will reach sea level.