Which speed(s) is/are below the sound barrier in air?
a. 257 m/s
b. 1,030 m/s
c. 10 m/s

a and c

a, b, and c

c

a

99 points

A and C is your answer.

The sound barrier is 343 m/s.

1030 > 343 > 257 & 10, which means that 257 & 10 are your answer.

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Answer is: A and C, and that is due to all the sound barriers in the air that gets calculated.

Hope this helped!

Nate

true is the

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves