Si tienes una hoja de papel, que mide 10cm x 20cm, aplica la derivada de una función para conocer el volumen máximo que se puede obtener según las dimensiones de la hoja.

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

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?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"