There is no such symbol for joint sets. Actually, there is a representation for joint sets. That is: The sets are joint if A ∩ B is not empty. The sets are disjoint if A ∩ B is empty.
b
One hundred million in ONE billion. In billions, depends on how many billions.
10 billions
If a is not less than b then a is greater than or equal to b. The symbol for "greater than or equal to " is > with a bar under it -- a combination of the equal sign (=) and the greater than sign (>). In many computer languages you can use >= with no space between for this relation.
The symbol for boron is B.
The atomic symbol for boron is B.
The scientific symbol for boron is B.
The symbol "b" does not stand for anything, but "B" stands for boron.
The symbol for borilium is B, not to be mistaken with the element Boron, whose symbol is B as well. But there is no known element with the symbol "borilium".
The chemical symbol for the element boron is B.
The symbol for Alteva (D/B/A) in the AMEX is: ALTV.
The symbol for B Communications Ltd. in NASDAQ is: BCOM.
The shorthand symbol for 'between' is the symbol "->".
b
The element symbol for boron is B.
B