Dallas needs 1/4 liter of milk for a recipe , and there is 3/10 of a liter of milk left in the carton. how much is left after dallas makes his recipe?

namely is just the difference of 3/10 - 1/4, since the denominators are 10 and 4, the LCD will then be 20.

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