Measurement, Errors, Data and Unit Conversion

A microgram is one millionth (0.000001 or 10−6) of a gram. A = 1 kg; B = 1 g; D = 1 milligram.

This (1 × 103 g) is 1000 = 1 kg.

1 mg is 1000μg, so 5 mg = 5000 μg.

C is also correct but choice B is the better answer.

You need to know that 8 oz is half a pound and that “a half” is the same as 0.5! Hence 7 lb 8 oz = 7.5 lb = 7.5 × 0.454 = 3.4 kg.

1 mg is a thousandth of a gram (0.001 g), so 120 mg is 120 thousandths = 0.120 (mg to g: shift the decimal point three places to the left).

Gino’s birthplace is “named” so the information is nominal, but no other information is available.

The arithmetic mean is the sum of the ten wages, divided by the number of wages (10). So $5260 ÷ 10 = $526.

Milli = one thousandth = 10−3.

There are 1000 μg in each milligram. Hence 2.25 thousands is 2250 (mg to μg: shift the decimal point 3 places to the right).