In converting 540 inches to yards, what unit (omit the number) would you place in the numerator of your ratio? use the plural form in your answer. remember that there are 36 inches in 1 yard.

540 inches / 36 inches = 15 yards

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle