THE SAINT LOUIS GATEWAY ARCH
The Saint Louis Gateway Arch (pictured at right) has a shape much like a parabola. Suppose the Gateway Arch can be approximated by , where both x and y represent distances in feet and the origin is the point on the ground directly below the arch's apex (its highest point).
a. Find the x–intercepts of the Gateway Arch. What does this information tell you? Use a calculator to evaluate your answers.
b. How wide is the arch at its base?
c. How tall is the arch? How did you find your solution?