Here is a small cuboid and a cube. Small cuboids and cubes are stacked in layers to make larger cuboids. Here is a cuboid made with four layers. The pattern is continued to make a cuboid with volume 336cm3. How many cubes are used?

Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit