Programmimg Radio Buttons

I would like to be able to perform a math function elsewhere in the form based on whether a radio button is (or isn't) selected.  Possible.

You can assign calculation values to your options:

https://www.jotform.com/help/301-How-to-Assign-Calculation-Value

And use those values in calculations.  Or, you can trigger a conditional calculation of field update when a specific selection is made:

https://www.jotform.com/help/57-Smart-Forms-Using-Conditional-Logic