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I figured since y=0.0230 sin (34.6t-2.04x) the frequency=34.6 wavelength=3.08 and Amplitude=0.0230

Then I think I can solve for velocity using v=wavelength*frequency and get v=106.568

Now I am stuck as to what I am supposed to do.. I think I have to multiply the amplitude by 4 and then use it somewhere.. Perhaps this equation: v=squareroot of F/(m/L)

But now I am lost! Any help would be greatly appreciated!! Thank you!