What is the action and reaction in a rocket launch

Question and answers are in the attached picture. you so much in advance.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out