Solve the problem.
-The formula for the circumference of a circle is 
The circumference is a function of the radius. Write the function using function notation. Determine the circumference when the radius is 4 mi.
Definitions:
Callaway Golf Clubs
A brand of golf clubs known for advanced technology and superior performance.
Relative Reference Group
A group of individuals that an person compares themselves to for the purpose of evaluating their own behaviors, attitudes, or beliefs.
Product Influence
The impact that a product has on consumer behavior, perception, and purchasing decisions.
Friends
Individuals with whom one has a bond of mutual affection, typically exclusive of sexual or family relations.
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