Posted by **Derrick** on Saturday, March 24, 2012 at 11:07am.

Which is the closest to the speed of sound in air?

A. 7miles per hour

B. 70miles per hour

C. 700miles per hour

D. 7000miles per hour

C?

- Science -
**PsyDAG**, Saturday, March 24, 2012 at 12:02pm
I would agree with C.

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