What are the answers since I’m confused an all over the place

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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?