Problem: Suppose that a standing wave on the flagpole gives rise to a sound wave of the same frequency. A person would be able to hear the sound produced by the above standing wave, since the average human being can detect sounds at frequencies between 20.0 Hz and 20.0 kHz. A nearby mouse, however, can only detect frequencies between 1.01 kHz and 90.0 kHz.
Part A: What is the lowest flagpole harmonic that the mouse can hear?
I need help to find the lowest flagpole harmonic that the mouse can hear.