10,20,30,40,50,60,70,80,90,100,110,120,130,140,160,170,180,190,210,220,230,240,250,260,270,280,290,310,320,330,340,350,360,370,380,390,400,410,420,430,440,460,470,480,490
a)8,4285 б)51,4 в)0,0007