Question

Evaluate 27 × a-2 for a = 3.

one-third

one-ninth

9

3

Answer 1

The negative exponent requires you to move the constant to a denominator to make it a positive exponent. \[3^{-2}=\frac{ 1 }{ 3^{2} }\]So if you multiply, you get \[27\times \frac{ 1 }{ 9 }\]Can you handle it from there or no?

Answer 2

THANK YOUUUUUUUUUU

Answer 3

My pleasure!