Ali bought 4 CDs that were each the same price. Including sales tax, he paid a total of 43.60 dollars. Of that total, 2.80 dollars was tax. what was the price of each CD before tax?

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

10% of 1,900,000. show me how you got the answer

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?