Which statements about limiting reactants are correct? more than one answer may be correct?

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?  

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"