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

the cell theory states that all living things including animals, as well as plants, are made of cells.

i think the answer is g1

hope i

-lavira: )