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Ends 8/21.

ACT Question for August 21st

Sounds can vary in both loudness (intensity) and pitch (frequency).  Loudness is usually measured in decibels (dB), and pitch is usually measured in Hertz.  Figure 1 shows the loudness and pitch of common sounds. 

Figure 1

The pitch of the sound made by rustling leaves is most similar to that of:

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Question ID: 5818