An astronomical unit (AU) is the average distance of the earth from the sun.
Kilometres are the appropriate unit.
pound
A square metre is a unit of area. A linear foot is a unit of length. The two units are therefore incompatible.
This depends on the situation. The main power unit used for electric power output is generally the Watt (W), while the main power unit used for mechanical power output is often the horsepower (hp).
A gram is a metric unit of mass. Ounces are not metric. Ounces might be a unit of weight, but they might also be a unit of liquid volume, and you have to guess which one is intended, because they're not equivalent. Also, a fluid ounce in the US is not the same as a fluid ounce in the UK, but a ounce of weight in the US is exactly the same as an ounce of weight in the UK.
it is in the us customary unit or else we wouldnt be learning about. there for it is in the us customary unit.
gf
Inch is a length unit not an area unit.
seconds
The SI unit is a Newton. The old US unit is the pound-force or the poundal.
The dollar
a
euros
what is the German unit of currency?
there is no unit, but its usually ___ people per kilometer [or meter] squared
METRIC
The US dollar.