When the British Pound Sterling went decimal, the first coin issued was the 50 pence coin in 1969. When congress based the buck on the meter in 1792, the mint issued a 50 cent and 20 cent coin. In a few years the 20 cent coin was abandoned for a quarter or 25 cent coin. The British today cling to the 20 pence coin last I checked. Our half penny or 5 mill coin was short lived.
Russia was first with a decimal currency in 1704 with 100 kopecs to the rubal. US was first with a decimal metric currency in 1792. 100 cents to the buck, 1000 mills to the buck. Printing and minting began in 1793 as I recall.
US gasoline prices are posted in dollars. $3.199. The last 9 represents mills. A hard metric number ends in 0 or 5.
New Zealand won't accept the former 118 mL old Spice After Shave, but will the current 125 mL version. The US accepts both.
Moron? In the class rom I answered this directive correctly. Name the formula that tells us the speed of light from my flashlight while I travel 100 km/h by AMTRAK. My intelligence status is a bit above moron.