Correction for the speed of The Speed of Sound
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How fast is 18,400,000 feet per hour?
It's about four-and-a-half times as fast as The Speed of Sound
The speed of The Speed of Sound is about 4,050,000 feet per hour.
(in dry air at 20°C)
The speed of sound in dry air at 20°C (68°F) is 4,050,000 feet per hour. Air is a relatively poor acoustic conductor, however, as sound will travel at speeds of between 17,700,000 feet per hour to 18,400,000 feet per hour in water, depending on its salinity.