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how to multiply 2 digit number to 2 digit number..
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What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16