From $$9:30$$ A.M. until $$1:15$$ P.M. is $$3$$ hours and $$45$$ minutes. Add $$3$$ hours and $$45$$ minutes to $$1:15$$ P.M. to get $$5:00$$ P.M.. 
Ron\textquotesingle s work day is half over at $$1:15$$ P.M. if he starts work at $$9:30$$ A.M., his work day ends at． 
Options:
(1) $$4:30$$ P.M. 
(2) $$5:00$$ P.M. 
(3) $$5:30$$ P.M. 
(4) $$9:30$$ P.M. 