[tex]a) ou \to omida \\\\\ \frac{1}{3} \ din \ 3 \ saptamani= \frac{1}{\not 3}* \not 3* 7 \ zile \longrightarrow \boxed{7 \ zile} \\\\\\ b)omida \to crisalida \\\\ 3*7=21 \ zile \\\\ 21-7= 14 \ zile \to \underline{restul} \\\\ \\ \frac{3}{4} \ din \ rest= \frac{3}{\not 4} * \not 14= \frac{3}{2}* 7= 1,5 *7= 10,5 \ zile ( \hbox{10 zile si jumatate)} \\\\ c) crisalida \to fluture \\\\ 14-10,5= 3,5 \ zile \ (\hbox{3 zile si jumatate)}[/tex]
