Intermediate Algebra Words Problem

Question

An arch in the shape of the upper half of an ellipse is used to support a bridge spanning a creek 34

feet wide. The center of the arch is 9 feet above the center of the creek. Write the equation for the

ellipse in which the x-axis coincides with the road and the y-axis passes through the center of the

arch.

Answer 1

elipse circumference=(r1+r2)pi

(17+4.5)pi/2=33.772ft

r1=x

r2=y