Can anyone please help me with these questions?

What is the length of an with endpoints a 3,2 and b 8,14

Convert 2000 swiss francs to dutch guilders

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.