Monetary Unit -

: Despite being called "paper money," U.S. bills are actually a blend of 75% cotton and 25% linen .

Modern monetary units are rarely backed by physical gold or silver; instead, they exist as , valued because of government decree and their use in paying taxes. monetary unit

: A standard $1 bill is designed to survive roughly 4,000 double folds before tearing. : Despite being called "paper money," U