Which of the following represents a null set? A.{dogs with six eyes}
B{grains of sand on the seashore)
C.{Kadian, Betty, Pam, Jane}
D.{n, 1, 1, 1}

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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 square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

With number 11 ( show how you got the answer)