The cubs need 140 pounds a week because 4 x 35 = <<4*35=140>>140
The family needs 350 pounds a week because 210 + 140 = <<210+140=350>>350
The family needs 50 pounds a day because 350 / 7 = <<350/7=50>>50
She needs to hunt 10 rabbits a day because 50 / 5 = <<10=10>>10
#### 10