Face value is $5. Collector value in Fine condition would be about $10 according to my not-too-far-out-of-date Blackbook.
It's still legal tender at face value, so yes.
Despite their age, $20 bills from the 1950 series rarely sell for more than a dollar or two above face value.
If worn, face value only. If it has only slight wear, it might retail for $7-8.
Face value only.
The face value of ANY bill or coin is simply another word for its denomination. Thus any $1 bill has a face value of a dollar, a $100 bill has a face value of one hundred dollars, and so on.The collector value of a bill or coin can be very different, depending on a number of factors. For more information about a 1923 $1 bill please see the question "What is the value of a 1923 US 1 dollar bill?"
20.00 dollar bill 2 face
Despite its age your bill is only worth face value if it's in circulated condition. If it's nearly new in appearance it could retail for up to $70.
Face value to $70 depending on condition
Right now those are only worth face value. They just aren't rare.
Since this bill is not rare and is circulated it is worth face value.
This is not a rare series date. In circulated condition it's only worth face value to maybe $7 or $8 if it has almost no visible wear.
$100 $100