Question: A wave is described by the expression (y(x, t)=(3.0 mathrm{~cm}) times) (cos (1.5 x-50 t)), where (x) is in (mathrm{m}) and (t) is in (mathrm{s}).

A wave is described by the expression $y(x, t)=(3.0 \mathrm{~cm}) \times$ $\cos (1.5 x-50 t)$, where $x$ is in $\mathrm{m}$ and $t$ is in $\mathrm{s}$. What is the speed of the wave and in what direction is it traveling?

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