1. A suspension bridge has two towers that rise 500 above the road and are connected by cables that hang in the shape of a parabola that can be represented by the formula :
   
   y = (1/8960)(x-2100)² + 8
   
   where x and y are measured in feet and x is the distance from the left tower in the direction of the right tower. What is the distance between the two towers?
   
   
2. A football is kicked into the air. Its height in feet after t seconds is given by
   
   h = 4.9(f-2.4)² + 29
   
   What is the maximum height of the ball?
   
   
3. A rocket is shot off from a 50 foot platform and reaches a height of 100 feet after 4 seconds. What is the quadratic equation that will represent this event?
   
   
4. A rocket is shot off from the ground and reached a height of 750 feet after 5 seconds. What is the quadratic equation for this event?