Question

Please help with this math im begging

Answer 1

`\qquad \qquad \textit{combined proportional variation} \\\\ \begin{array}{llll} \textit{\underline{y} varies directly with \underline{x}}\\ \textit{and inversely with }\underline{z^5} \end{array} ~\hspace{6em} \stackrel{\textit{constant of variation}}{y=\cfrac{\stackrel{\downarrow }{k}x}{z^5}~\hfill } \\\\[-0.35em] ~\dotfill`

`\begin{array}{llll} \textit{`

`200=\cfrac{k(3200)(25)^2}{400}\implies 200=5000k\implies \cfrac{200}{5000}=k\implies 0.04=k \\\\\\ ~\hfill~\boxed{f=\cfrac{0.04ws^2}{r}}~\hfill~ \\\\\\ \textit{when r = 550, s = 55, w = 3200, what's`