<PRE><B>Question 379412</B>
Your cap size is based on the circumference of your head (in inches). For a certain range of head circumferences c, cap size s can be modeled by the following equation: 
s= (c-1)/3 
If you wear a size 7 cap, what is your head circumference

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7 = (c-1)/3
c-1 = 21
circumference = 22 inches
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cheers,
Stan H.</PRE>