This is a slightly ambiguous and unsatisfactory situation. (you can view the symbols I will be discussing in the document <http://amath.Colorado.edu/documentation/LaTeX/Symbols.pdf >)
The relation "contained in" is commonly denoted by the symbol which would be typeset in latex by $\subseteq$. The answer to your question ought to be $\subset$, but is not, because the meaning of $\subset$ within the mathematical culture is more or less synonymous with a slightly vaguer version of $\subseteq$. More precise symbols to convey "properly contained in" in latex are $\subsetneq$,\varsubsetneq, \subsetneqq and \varsubsetneqq --I don't know if there is a MSWord version of these symbols. However, the use of these symbol is uncommon and unexpected: even though people will guess that you mean "properly contained" when you use these symbols, but you had better advertise your meaning in words to confirm the guess
The asterisk (*) symbol is contained on the numeric keypad.
It contained a zero symbol which made arithmetic a lot easier.
Because the Hindu-Arabic numeral system contained a zero symbol which made mathematical calculations a lot simpler than the Roman numeral system which didn't have a zero symbol.
Because of the introduction of the Hindu-Arabic numeral system during the Middle Ages which was more efficient than the Roman numeral system inasmuch that it contained a zero symbol.
Is true
CORRECT
The asterisk (*) symbol is contained on the numeric keypad.
self-contained
The "symbol" for a compound is properly called a chemical formula, and for methylene chloride it is CH2Cl2.
Radiation leaks can get into the air if not contained properly and cause cancer.
It contained a zero symbol which made arithmetic a lot easier.
A chemical symbol refers to a chemical element; the first letter of a symbol depends on the chemical element.
If it is properly contained and isolated none however it can be a horible invasive poison if it is allowed to get out of controll.
The Star of David (more properly called the Shield of David) is a symbol of the Jewish people, though to be fair, it is not an ancient symbol; it originated in the Middle Ages.
An infinity symbol looks like the number 8 turned sideways. This is an infinity symbol: ∞ If for some reason that symbol does not come out properly, you can see the article listed below. There are several graphics of the infinity symbol there. http://en.wikipedia.org/wiki/Infinity
No, it is not legal to own a Coatimundi as a pet in Michigan. The state considers them to be wild animals and prohibits private ownership without specific permits or licenses. It is best to check with local authorities or wildlife agencies for the most up-to-date regulations.
You should dispose of chemicals in bins at contained hazardous waste sites. These sites will properly dispose of your used chemicals for you.