Giga is a billion in the metric system.
In the metric system, the prefix for 1 billion is "giga-".
Giga- It is worth noting that when used in computer terminology, this prefix is something of an anachronism. The computer prefix "Giga" refers to 2^30, which is 1,073,741,824 and not 1,000,000,000 as Giga means in the metric system.
If you mean the American billion (1,000,000,000), the metric prefix is "Giga".If you mean the American billion (1,000,000,000), the metric prefix is "Giga".If you mean the American billion (1,000,000,000), the metric prefix is "Giga".If you mean the American billion (1,000,000,000), the metric prefix is "Giga".
1x10^9 = Giga http://en.wikipedia.org/wiki/SI_prefix
In the SI (metric) system of units, the prefix "giga..." means "a billion of them".
Giga is the SI prefix representing 109, or billions. 1Gm, one gigametre, equals 1 billion metres, 1 000 000 000m.
It could be 4 micro-[units].
The metric system prefix for the quantity 0.000001 is micro- (symbol: μ).
The metric system prefix for the quantity 0.000 001 is micro-, denoted as μ. This represents one millionth of the base unit.
The metric prefix for 10 to the ninth power is "giga." It is abbreviated as "G" and represents one billion.
Assuming you mean the American billion (a 1, followed by 9 zeroes), the prefix is Giga, abbreviated "G".
15m would typically refer to 15 meters, which is a unit of length used in the metric system.