1. .Show how to solve 5x^2+7x+6 by quadraticformula. You must show all work and steps.
2. Show how to solve 5x^2+20x+13=0 by completing the square. You must show all work and steps
3. Show how to set up and solve for each part.

David drops a ball from a bridge at an initial height of 100 meters.

(a)What is the height of the ball to the nearest tenth of a meter exactly 3 seconds after he releases the ball?

1. (b)How many seconds after the ball is released will it hit the ground?