Which pair of events is dependent?

Dependent events means they DEPEND on each other. If 1 events were to change, then the other would also change.

Step-by-step explanation:

If you are tossing 2 coins, those coins do not depend on each other. If 1 outcome changes, the other will not be affected.

If you are tossing the same coin you still have a 50/50 chance each time so these are not dependent.

Drawing 2 cards WITH replacement will not change the probability so these are also not dependent.

Picking 2 billiard balls WITHOUT replacement IS dependent. If you were to pick a certain ball, that ball is no longer available so the probability can change because it depends on what ball is chosen first.

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