If the distance from the crest of a wave to the next crest in 10 cm, and the distance from the crest to the trough is 4 cm? what is the wavelength and what is the amplitude of the wave.

The equation that describes a transverse wave on a string is y = (0.0120 m)sin[(927 rad/s)t - (3.00 rad/m)x] where y is the displacement of a string particle and x is the position of the particle on the string. the wave is traveling in the +x direction. what is the speed v of the wave?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Could someone me find the answer to this problem.