Is each of the following a function? yes or no1:   (2,1) (4,3) (6,5) (8,7)2:   (2,1) (4,3) (6,5) (2,7)3:   (2,1) (4,1) (6,5) (8,7)

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.