If we assume a temperature of 20°C the speed of sound is 343 m/s.
1.3 times 343 m/s = 445.9 m/s.
Mach 3.6 = 2,740.34 mph
Mach 10 is equal to 7,612.71 miles per hour (mph) at standard atmospheric conditions.
It depends on air pressure and temperature, or altitude. On a sea level it will be around 9120 mph, on 36000ft it will be 7900 mph.
This is the rough formula. Mach = velocity/speed of sound This is rough because conditions are truly variable, but............ 79 Mach = velocity/768 mph = ~606070 miles per hour
Mach 9.6 is approximately 11,700 kilometers per hour or about 7,300 miles per hour. It is nearly 9.6 times the speed of sound in air at sea level.
Mach 0.8-1.0
Mach 1.7 is equal to about 1294 mph.
645.38104_MPH_">645.38104 MPH-is 0.87 Mach -
Mach 6 is about 4,449.3 mph
the SR 71 goes really fast it goes Mach 7 NOT Mach 3.
Mach 3.3 is about 2,512 mph depending on altitude.
Mach 889 is about 659,233 mph
mach 2.03
Mach 0.7 is 533 mi/h (rounded)
1,750.8 mph
Mach 6 is about 4,567 mph
The Mach number for speed is a function of how fast an object is going relative to the speed of sound in that medium (which can vary). The speed of sound at sea level is around 768 mph, so Mach 3.3 at around this level will be 768 x 3.3 = 2534 mph