Please write it in standard form.

Arandom high school question but a hard one

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

Do,h = (7, 9) (14, 18) the scale factor is