You spend half you money every week if after 6 weeks you have 8 dollars how much did you start with

Question

You spend half you money every week if after 6 weeks you have 8 dollars how much did you start with?

Answer 1

how much money did you have the day before, at 5 weeks(16 dollars)

how about at 4 weeks (32 dollars) 

continue this untill you are at week 0 

this is also in the ballpark of (2^3)^number of weeks