which feature of a wave can be calculated using the formula below? number of wavelengths /…

Answer:

C. frequency

Explanation:

Step1: Recall wave - related definitions

Frequency is the number of complete waves (or wavelengths) that pass a given point per unit time. The formula "number of wavelengths / time" is the definition of frequency. Wavelength is the distance between two consecutive points in phase on a wave. Speed of a wave is given by $v = f\lambda$ (where $v$ is speed, $f$ is frequency and $\lambda$ is wavelength). Amplitude is the maximum displacement of a particle in the medium from its equilibrium position.