The cell phone screen shows coordinates of six cities from a rectangular coordinate system placed on North America by long-distance telephone companies. Each unit in this system represents a  0.1 mile squared. 

The cell phone screen shows

San Francisco    (8495, 8720)

Chicago               (5985, 3439)

New Orleans      ( 8448, 2625)

Denver               ( 7490, 5881)

Houston             ( 8936, 3542)

Boston               (4422, 1241)

• Use this information to find the distance, to the nearest mile, between two cities of your choice.

• Using the same two cities, if the midpoint was calculated instead of the distance would you expect your answer to differ from part 1? Explain