Respostas

2014-04-10T21:14:44-03:00
C(x)= 7x + 3000
C (x)= x=3000/7
x= 428
R(x)= 12.428= 5136.
730.428= 312440
2 3 2
c=72
c=720 d= 830
a= 640 b= 650 c= 720 d= 830
cx=7x+3000= 7.730+3000=8110, Rx = 12.x = 12.730=8760, logo R-C = Lucro, então: 8760 - 8110 = 650
ok