Un cartón de leche es de forma cúbica y con- tiene dos litros. Otro cartón de 2 litros tiene
forma de prisma cuadrangular y la arista de su
base mide 10 cm. Calcula la superficie de am-
bos. ¿Cuál es menor?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?