Answer:
19 days
Step-by-step explanation:
because it doubles...
day 20: 1
day 19: 1/2
day 18: 1/4
day 17: 1/8
day 16: 1/16
day 15: 1/32
day 14: 1/64
day 13: 1/128
day 12: 1/256
day 11: 1/512
day 10: 1/1024
day 9: 1/2048
day 8: 1/4096
day 7: 1/8192
day 6: 1/16384
day 5: 1/32768
day 4: 1/65536
day 3: 1/131072
day 2: 1/262144
day 1: 1/524288
THIS TOOK FOREVER
