A sandbox in the shape of a rectangular prism is 7 feet long, 5 feet wide, and 1 foot tall. If six
inches is added to the height, how much more
sand can it hold?
HELP PLASSS!!!

A. 12 ft
B. 15Ft
C: 17.5 ft
D. 21 ft

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