PeterCBWang

If the 29th  days will be 50% of the bottle, 30th day will be full (50% x 2 = 100%).公仔箱論壇' X) y2 `4 I0 [0 \. q/ {0 m, r0 }
Answer is 29 days!  Q8 D5 A5 z4 I' ~2 q
plz answer