There are 186,000 miles per second in the speed of light...but sound is slower. Your question need to have more information. There are not any miles in a second. Seconds are a measurement of time, while miles are a measurement of length or distance.
70 miles per second is 252,000 miles per hour.
52 miles per second = 187,200 miles per hour.
About 4.7 miles per second.
0.033 miles per second or about 174.24 feet per second.
4.7 metres per second is about 10.5 miles per hour.
186,000 miles per second. This is the 'miles per second' that it takes light to get anywhere in a vacuum.
.8 miles/second
44 mph = 0.012 miles per second
33 miles per second = 118,800 mph
40 feet per second is 27.27 miles per hour.
80.0 (km per hour) = 0.0138082487 miles per second.
6.81 km/s = 4.23 miles per second