Felicity earned $25 at a bake sale on Friday. On Saturday, she sold 25 brownies at 50 cents each. On Sunday she bought new baking supplies for $18. How much money did she have left after buying the baking supplies?

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