The circumference of a circle is given by 
where 
is the radius of the circle. What is the circumference of a circle with a 6-in. radius?
Definitions:
Roe V. Wade
1973 U.S. Supreme Court decision requiring states to permit first-trimester abortions.
Osama Bin Laden
The founder of al-Qaeda, a jihadist organization responsible for numerous terrorist attacks, including the September 11, 2001 attacks on the United States.
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