Rewrite the Expression with a Positive Rational Exponent $9 ^ { - 1 / 2 }$

question 33

Multiple Choice

Rewrite the expression with a positive rational exponent. Simplify, if possible.
- $9 ^ { - 1 / 2 }$

• A) \(- \frac { 1 } { 3 }\)
• B) \(- 3\)
• C) \(\frac { 1 } { 9 }\)
• D) \(\frac { 1 } { 3 }\)