"Customary units" refer to a system of measurement commonly used in the United States, which includes units like inches, feet, pounds, and gallons. These units are contrasted with the metric system, which is used in most other countries and includes meters, kilograms, and liters. Customary units are often used in everyday contexts, such as cooking and construction, and are based on historical conventions rather than a decimal system.
International System of Units
Less than 6 units or more than 10 units.
a square 20 units long and 20 units wide
If you mean the units, the most commonly used units are degrees, and radians.
2 units.
The same units as the mean itself. If the units of the mean, are, for example miles; then the error units are miles.
what do you mean by input/ouput units?
International System of Units
I don't mean anything because I never used the term "units of measuring weight."
unit x unit = square units
Less than 6 units or more than 10 units.
Those are units of mass.
It is not clear what you mean with "units of power".
if you mean, 3000microlitres, then yes. You need to state units of what?
a square 20 units long and 20 units wide
If you mean the units, the most commonly used units are degrees, and radians.
If you mean a width of 5 units then the volume is: 9*5*6 = 270 cubic units