exam Maths Puzzle Numerical Ability

Could you please show me how to solve a number to a Power which is less than one such as:

12 to the power of 1/2

Thank you,
Paul

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exam Other Question

Name the property of real numbers illutstrated below. Be specific w/ the naming. Include "of addition" or of" multiplication if needed.
8*(4*9)= (8*4)*9 A large pump can fill a 54,000 gallon reservoir in 8 hours. Working together, the largepump and a smaller one can fill the reservoir in 6 hours. How long would it take the smaller pump to fill the reservoir by itself?