Yes! I am in the process of earning two majors; Management and Psychology, and am thinking about going for my third major; Italian.
There are many fields where a double-major in math and physics are applicable:AstrophysistClimatologistCost EstimatorForensic AnalystQuantum MechanicTeacher
Physics, Chemistry and Biology are three major fields in science.
The two major fields of science are Social Science and Natural Science.
You can go for a double major if that's what you mean but it's hard if they aren't in related fields.
Marie curie's major fields of study are Physics chemistry and especially radioactivity.
While just about anything in the business or marketing fields will do a double major or minor in psychology would put you ahead of the pack
There is no set amount of double headers. It all depends on conditions of fields, and weather. If a game is rain delayed or cancelled, they league will set up a double header for the next time the teams meet.
Just like in the US, different job sectors are available in Guatemala. Govt. jobs and engineering jobs are major fields. Teaching and education is a another major job sector. You can even find IT jobs there.