* Speed of sound: Approximately 767 mph (varies slightly depending on air temperature and altitude).

* Five times the speed of sound: 767 mph * 5 = 3835 mph

Therefore, speeds between 3820-7640 mph are indeed more than five times faster than the speed of sound.

Mach 5: Mach number represents the ratio of an object's speed to the speed of sound. Mach 5 would mean five times the speed of sound, which aligns with the range you provided.