Given: B = {(4,2), (4, -2), (16,4), ...} Is B a function and why? A. Yes, each set of ordered pairs in this list has no repeat of a range element.

B. No, the number 4 is an element in the domain and range.

C. Yes, there is more than one ordered pair in this list.

D. No, two ordered pairs in this list have a repeat of the domain element.

D. No, two ordered pairs in this list have a repeat of the domain element.

Step-by-step explanation:

A function is a set of ordered pairs in which no two different ordered pairs have the same x -coordinate (the domain element).

So B is not a function because two different ordered pairs have the same x -coordinate: (4,2), (4, -2)

Therefore answer D is correct.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m