Odpowiedź:
[tex]Zad.1.[/tex]
[tex]I - 1h 50 min\\przerwa-10min\\II-2h15min\\przerwa-10min\\III-1h25min\\przerwa-20min\\IV-1h45min[/tex]
[tex]1h50min+10min+2h15min+10min+1h25min+20min+1h45min=5h+175min= 5h+2h+55min=7h+55min[/tex]
[tex]21:15+7h+55min=5:10\\Odp. D.[/tex]
[tex]Zad.2.\\\frac{z}{9}=4,8 /*9\\z=43,2\\\\\frac{z-6}{8}=\frac{43,2-6}{8} =\frac{37,2-6}{8}=4,65\\Odp. B\\\\Zad.3.\\\\\sqrt{200} -3 ok. 14-3=11\\\sqrt{185}-1= 13,5-1=12,5\\\sqrt{125}+2=11+2=13\\\sqrt{98} +4=9,5+4=13,5\\Odp.B.[/tex]
