



 
Hi Richard, A cubic yard is 3 feet by 3 feet by 3 feet so a cubic yard is $3 \times 3 \times 3 = 27$ cubic feet. Thus 2.56 cubic yards is $2.56 \times 27$ cubic feet. One bag covers 8 cubic feet so if the depth remains the same you will need \[\frac{2.56 \times 27}{8} = 8.64 \mbox{ bags.}\] Penny  


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