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Horseshoe bats emit sounds from their nostrils and then listen to the frequency of the sound...

Horseshoe bats emit sounds from their nostrils and then listen to the frequency of the sound reflected from the prey to determine the prey's speed. Determine the speed of an insect flying towards the bat if the bat is flying at 3.9 m/s, the bat emits a sound of frequency 80.9 kHz, and the bat receives a reflected sound of frequency 83.1 kHz.
(include units with answer)



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