Find the surface area. please

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?  

Someone me! if you’re smart you can solve this!

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if