I need help pls im in middle of class and have 5 min pls 20pts

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?  

Select the lengths in centimeters that would form a right triangle

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply