Math problem HPP
2(x+8)-2=897

On a piece of paper graph f(x)=5•(0.4)^x

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

If the discriminant if a quadratic equation is 4 which statement describes the roots?