literally a goat if someone gives me an answer for this please

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

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

Change negative exponents to positive, then solve