Need help with the answer

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

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

If rt is greater than ba, which statement must be true ?