Respuesta :

[tex]\begin{gathered} \frac{9}{n}=\frac{0.9}{3.6} \\ \text{cross}-mu\text{ltiplying we have} \\ 0.9n=9\times3.6 \\ \Rightarrow n=\frac{9\times3.6}{0.9} \\ \Rightarrow n=36 \end{gathered}[/tex]

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