One end of the rope is vibrated to produce a wave with a wavelength of .25 m. The Frequency
of the wave is 5.0 Hz. What is the speed of the wave?

Wave speed = 1.25 m/s

Explanation:

Given that the

wavelength = 0.25 m.

Frequency F = 5.0 Hz

The speed of a wave is the product of wave frequency and the wavelength. That is

V = F λ

Where

V = wave speed (m/s)

λ = wavelength (m).

F = frequency (Hz).

Using the formula above gives:

V = 0.25 × 5

V = 1.25 m/s

i think the answer is a, hope this is right, that would be my best guess.