Iwas gone today at school and know i have no clue what to do!

How do you find principle and simple interest

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

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.