The owner of the west end kwick fill gas station wishes to determine the proportion of customers who pay at the pump using a credit card or debit card. he surveys 100 customers and finds that 80 paid at the pump. (round your answers to 2 decimal places.) estimate the value of the population proportion.

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