How do you know when to use the secant-secant product theorem or the secant-tangent product theorem?

What is the prime factorization of 195

Use the multiplier method to incrases £258 by 43%

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