Recall that an integer 'd' is said to be a divisor of an integer 'a', if 'a/d' is also an integer. for how many integers 'a' between -200 and -1 inclusive is the product of the divisors of a negative?

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