Write and solve a problem about the flying time between a pair of cities shown on the cellphone screen for Exercises 71–72. Do not use the pairs in Exercise 71 or Exercise 72. Begin by determining a reasonable average speed, in miles per hour, for a jet flying between the cities.

Data from Exercise 71-72

The cellphone 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 √0.1 mile.

TH Long-Bistance San Francisco (8495, 8720) (5985, 3439) (8448, 2625) Chicago New Orleans Den ver Houston Boston (7490, 588 1) (8936, 3542) (4422, 1241) n