Which of these numbers are rational?

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.

Use sigma notation to represent the following series for 9 terms.

Factor 15x^3 - 5x^2 +6x-2 by grouping. what is the resulting expression