Evan takes 100 milligrams of medicine. the amount of medicine in his bloodstream decreases by 0.4 milligram each minute for a number of minutes, m, after that. he writes the expression 100 – 0.4m to find the amount of medicine in his bloodstream after m minutes. which statement about his expression is true?

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