The results of a recent World Health Organization (WHO) study stated that a 90% confidence interval on the annual cost of rabies in Asia and Africa was $540 - $626 (in millions). Use these numbers to answer the following questions. Show work and put answer (include units) on line provided.

a. What is the WHO’s point estimate of the annual cost of rabies in Asia and Africa?

b. What is the margin of error?

c. What is the width of the interval?

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