Acar travels along a straight line at a constant speedof 60.0 mi/h for a distance d and then another distance d in the same direction at another constant speed. the average velocity of the entire trip is 30.0 mi/h (a) what is the constant speed with which the car moved during the second distance d?

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