Free points im also rly bored rn

Round 0.866 to the nearest hundredth

Which expressions are equivalent to -6 + 3m

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?