Các vectơ nào sau đây tạo thành một cơ sở của 3  ? A. (1,1,3);(0,2,1);(0,0, 3) B. (1,1,1);(1,1, 0);(2,2,1)
C. (1,2,3);(4,5,6);(7,8,9) D. (1,2,1);(2,4,2);(1,1,2)

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

What is the volume of this container?