3 ft = _ yd

(a)  

1 in = (a)   cm

1 km = (a)   m

1 m = (a)   cm

1 mi = (a)   km

1 mi = (a)   ft

1 kg = (a)   g

1 kg = (a)   lbs

1 lb = (a)   oz

1 ton = (a)   lbs

1 metric ton = (a)   kg

1 metric ton = (a)   lbs

1 L = (a)   mL

1 mL = _ $$cm^2$$   

(a)  

1 $$m^2$$   = (a)   L

1 gal = (a)   L

1 gal = _ qts

(a)  

1 qt = _ pints

(a)  

1 hr = (a)   mi

1 min = (a)   s

1 day = (a)   hrs

1 year = (a)   days

30 days = _ month

(a)  

1 century = (a)   years

1 Millenium = (a)   years

1 leap year = (a)   days