Choose the correct variant:
There are 584 students at the department:

А) Five and hundred eighty-four. В) Five hundred and eighty-four. С) Five eighty-four hundred. D) Five hundred eighty fourth. E) Five hundred and eighty four.
Объясните, пожалуйста, ПОЧЕМУ. Я вообще этого не понимаю

Can you explain the difference between eighty four and eighty-four

eighty-four, we use hyphens since it is the two word number but do not use it in the case of hundreds, thousands etc. example: 584= five hundred and eighty-four

thank you very much