Final answer:
The frequency of the wave is 441.56 Hz.
Step-by-step explanation:
To find the frequency of the wave, we can use the formula:
Frequency = Speed / Wavelength
In this case, the speed of the sound wave is given as 340 m/s and the wavelength is given as 0.77 meters.
Plugging these values into the formula, we get:
Frequency = 340 m/s / 0.77 m = 441.56 Hz
Therefore, the frequency of the wave is 441.56 Hz.
This frequency corresponds to the note A above middle C on a piano. The other options (a, b, d) are not accurate for the given wavelength and speed, making option c the correct choice.