Mary spent 12/24 of her time on an exam. If she spent 10/24 of her time on preparing for the exam, what fraction of her time did she spend on writing the exam?

With number 11 ( show how you got the answer)

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

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