Which is one reason why this expression is equal to ?

Evaluate the following expression 1/3^2

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

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