Which equation can be used to calculate the speed of a wave?
- A$\text{speed} = \text{amplitude} \times \text{frequency}$
- B$\text{speed} = \text{amplitude} \times \text{wavelength}$
- C$\text{speed} = \text{frequency} \times \text{wavelength}$
- D$\text{speed} = \frac{\text{frequency}}{\text{wavelength}}$