Find the volume of the right cone shown as a decimal rounded to the nearest 10th

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 radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Graph the equationy= x+3[tex]y = x + 3[/tex]