Which point represents (-6, pi/12)?

Which of the following graphs represents the function f(x) = 2^x

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

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