D _ Y
1 9 ,
_ T ' S
N _ T
1 0
B _ C _ _ S _
_ N
D _ Y
2 0
S H _
D _ _ B L _ D
F R _ M
D _ Y
1 9 ,
S _
1 9
M _ S T
B _
H _ L F
T H _
S _ Z _
_ F
T H _
P _ N D Clue
DAY 19, IT'S NOT 10 BECAUSE ON DAY 20 SHE DOUBLED FROM DAY 19, SO 19 MUST BE HALF THE SIZE OF THE POND IT WOULD TAKE 47 DAYS TO COVER HALF OF THE LAKE, AS THEY DOUBLE IN SIZE EVERY DAY IT WILL TAKE 198 DAYS. LET'S SAY THE TREE WAS ORIGINALLY ONE FOOT TALL. ON THE FIRST DAY, IT GREW HALF A FOOT; ON THE NEXT DAY 1⁄3 OF 11⁄2 FEET, WHICH IS HALF A FOOT; AND SO ON - IT GREW HALF A FOOT EVERY DAY. SO IN 198 DAYS, IT GREW 99 FEET, AND THEN WAS 100 FEET TALL THE DISH WAS HALF FULL AT 12.59 PM. SINCE THE BACTERIA DOUBLES EVERY MINUTE, THEN ONE MINUTE EARLIER, THE DISH MUST HAVE BEEN HALF FULL