Solve
-A Bridge with a Semi- Elliptical Arch Extends Over $\frac{x^{2}}{400}+\frac{y^{2}}{144}=1$

Multiple Choice

Solve.
-A bridge with a semi- elliptical arch extends over a river as shown. Find an equation of the ellipse that represents the arch of the bridge.

A) $\frac{x^{2}}{400}+\frac{y^{2}}{144}=1$

B) $\frac{x^{2}}{400}+\frac{y^{2}}{36}=1$

C) $\frac{x^{2}}{36}+\frac{y^{2}}{400}=1$

D) $\frac{\mathrm{x}^{2}}{144}+\frac{\mathrm{y}^{2}}{400}=1$