If the ratio of boys to girls is 2: 3, how many boys would you expect to find in a class with 21 girls?

If benito is selecting samples of five values from the table, which row will result in the greatest mean? row 1 row 2 row 3 row 4

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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?