How do you calculate 16^(1/2) without changing it to sqrt(16)? (Like how would you calculate any real number with its exponent being a fraction?)

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter24: Percent Practical Applications
Section: Chapter Questions
Problem 4A
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How do you calculate 16^(1/2) without changing it to sqrt(16)? (Like how would you calculate any real number with its exponent being a fraction?)
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