Answer:
The equation of ellipse is
.
Explanation:
Consider the provided information.
The rectangular piece of property measures 8 mi by 6 mi.
It is a vertical ellipse.
So, use the equation:

Where the value of a and b are:

The major axis is along y-axis with the vertices (0,4) and (0,-4).
The minor axis is along the x-axis, with the vertices (-3,0) and (3,0).
Now substitute the value of a and b in



Hence, the equation of ellipse is
.