Question

The arch of the Gateshead Millennium Bridge forms a parabola with equation y=-0.016(x-52.5)^2+45 where x is the horizontal distance(in meters) from the arch's left end and y is the distance (in meters)from the base of the arch. What is the width of the arch?

Answer 1

I got 105 meters by taking p=52.5 and adding q=52.5. Is 105 meters the width?

Answer 2

105