HELP DUE AT 12! I need to know

The highest common factor of 132 and 220

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

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online