During a certain six year period the consumer price index cpi increased by 50%, but during the next six year period, it increased by 30%. which of these condition must have existed during the second six year period?

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?  

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?