Here are the numbers of times 10 people ate out last month 5,5,4,4,4,3,5,6,5,4, find the modes of this data set

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 domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me