Does the mapping of the diagram represent a function? Why or why not?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left