Evaluate the Radical Expression If It Is a Real Number $\sqrt { \frac { 1 } { 9 } }$

Multiple Choice

Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest
hundredth. If the expression is not a real number, so state.
- $\sqrt { \frac { 1 } { 9 } }$

A) $\frac { 1 } { 81 }$
B) $\frac { 1 } { 3 }$
C) 3
D) 9