An arched footbridge over a 100-foot river is shaped like half an ellipse. The maximum height of the bridge over the river is 20 feet. Find the height of the bridge over a point in the river exactly 25 feet from the center of the river.
a.
15.45 ft
c.
17.32 ft
b.
16.25 ft
d.
19.24 ft

Please select the best answer from the choices provided

A
B
C
D