Which of the following is a unit fraction A. 3/7

B. 2/1

C. 1/32

D. 4/5

C

Step-by-step explanation:

Because a unit fraction is like 1/1 1/2 1/3 1/4 1/5

and all of those start with 1 so it is C. 1/32

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