1. Determine the standard form of equation for ellipse satisfying given conditons
Center (0,0); verticies (0, +- 7 ); c = 5
2. City A is due north of City B. Determine distance between City A (North latitude 50 degree 26 ' N) and City B (Latitude 48 degree 18' N). Use 3960 miles as the radius of the Earth.