Round to the underlined place value: 6.739 (underlined one is 7) 6.6 6.8 6.7 6.9

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?

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?

Why is x= 4 a solution to the proportion 14/x 56/1 6