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the speed of sound is approximately 720 miles per hour at sea level. At this rate, how many feet does sound travel in 20 seconds?

Respuesta :

charliekaufmann716

Answer:

Step-by-step explanation:

[tex](\frac{720 miles}{1 hour} )(\frac{1 hour}{3600 seconds} ) (\frac{5280 feet}{1 mile} )[/tex]

Units cancel to get answer in feet per seconds.

720 x 1/3600 x 5280  = 1056 feet per seconds

1056 x 20 seconds = 21120 feet

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