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If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Mrs. chibas is making chocolate chip cookies for her daughter's class. she bought a tub of chocolate chip cookie dough that contained 57.6 ounces of dough. if each cookie needs 1.2 ounces of dough, how many cookies can she make

Robin and john each a a 12 inch pizza about how many square inches of pizza did they eat? estimate how much pizza they ate