[tex]a)~i)~ \frac{28}{100} \cdot 300 =84~note~sub~7. \\ \\ ii)~ \frac{17}{100} \cdot 300 = 51~note~de~7. \\ \\ iii)~ \frac{12}{100} \cdot 300=36~note ~de~8. \\ \\ iiii)~ \frac{26}{100} \cdot 300= 78~note~de~10.[/tex]
[tex]b)~ 100 \%........................360 \textdegree \\ ~~~~~~~p \%.........................x \textdegree \\ ~~~------------ \\ ~~~~~~~x= \frac{p \cdot 360\textdegree }{100 }= \frac{18 \textdegree}{5} \cdot p . \\ \\ Deci~procentului~p \% ~ii~corespunde~un~unghi~cu~masura~de~ \frac{18 \textdegree}{5} \cdot p . \\ \\ Note~sub~7:~28 \% \Longrightarrow \frac{18 \textdegree}{5} \cdot 28 =100 \textdegree 48'. \\ \\ Note~de~7:~17 \% \Longrightarrow \frac{18 \textdegree}{5} \cdot 17= 61 \textdegree 12 '.[/tex]
[tex]Note~de~8:~12 \% \Longrightarrow \frac{18 \textdegree}{5} \cdot 12=43 \textdegree 12'. \\ \\ Note~de~9=~Note~de~7~\Longrightarrow 61 \textdegree 12'. \\ \\ Note~de~10:~26 \% \Longrightarrow \frac{18 \textdegree }{5} \cdot 26=93 \textdegree 36'.[/tex]
