Question: A bat named Forest is hanging at rest on a tree branch, and hears the sound of a flying bat, named Dash approaching. Dash always

A bat named Forest is hanging at rest on a tree branch, and hears the sound of a flying bat, named Dash approaching. Dash always emits a frequency of 30 khz, but forrest hears a frequency of 31khz. Forest replies with a 25khz frequency. The speed of sound that evening is 345 m/s. What frequency will dash hear from forest?

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