They are called dollars. See the Related Link for a picture of the different dollar amounts of US money. Note: The $2 bill is rare now.
No
The US uses dollars.in some countries, their money is double the US' one
They use US dollars.
The US used the same money as it does now.
US Dollars
The US Dollar
What money did columbus use
No, you can't use US money in Poland. The only currency which is allowed is polish zloty, which is Polish currency. There are a lot of exchange places where you can exchange your money into Polish money tough. :)
The US Dollar.
US Dollars ($).
the us dollar
dollars and sence