Find last year's salary if, after a 6% pay raise, this year's salary is $32,330.
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It belongs to the square root family. Your answer is B. Why the square root family? Because 
can be written as 
When you raise to 1/2 or 1/3 it is like saying the square root or the cube root.
When you raise to 1/2 or 1/3 it is like saying the square root or the cube root.