bella41943

1.25+1+1+1+2=30, no less
2.1*100=100
   50*(0.7+0.3)=50
3.8days
4.the first time 100
  the second time 100/3=33....1
  the third time 33/3=11
  the fourth time (11+1)/3=4
  the fifth time 4/3=1..1
  total 100+33+11+4+1=149