Paper money has an average circulation lifespan of around 7 years.
a long time
4 ever
Depends on how you use it.
Styrofoam cups last in the landfill for hundreds of years. Paper cups break down much faster. Paper would only last for a month.
12-18 months
Yes, Canada did have paper $1 and $2 bills. The paper $1 bill was in circulation from 1935 to 1989, while the paper $2 bill was in circulation from 1954 to 1996. Both denominations were replaced by coins (loonies for $1 and toonies for $2).
About 2-3 meters
As long as you don't wet the spot with the ink with any water.
In cold regions m9 paper lasts on average 12 months.
9 years
The answer depends on a variety of variables, but the simplest is that barring further action on the pencil mark (rubbing, wear, etc), it will last as long as the paper.