Happy Halloween!!!!! I was counting the trick or treaters that came to my house last year and noticed that from:
   6:00 - 6:15 - I had 5 trick or treaters
   6:15 - 6:30 - I had 10 trick or treaters
   6:30 - 6:45 - I had 20 trick or treaters
   6:45 - 7:00 - I had 40 trick or treaters
   7:00 - 7:15 - I had 80 trick or treaters
   7:15 - 7:30 - I had 80 trick or treaters
   7:30 - 7:45 - I had 40 trick or treaters
If this pattern continues, when can I close my door and assume that there will be no more trick or treaters coming to my house?  ____________
How many candies do I need to be prepared to hand out this year? __________