Which of these would not produce a representative sample that determines the favorite sport of the students at the local high school?
ask five students from each classroom chosen by picking numbers
ask ten students wearing football jerseys each day for a week
ask every tenth student from a list of names in the student directory
ask every tenth student who arrives at school on Wednesday

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

b

step-by-step explanation:

a

step-by-step explanation: