Answer:
StartFraction 1 Over 81 EndFraction
Step-by-step explanation:
To get the equivalent expression for 9^-2, we will use the law of indices to solve it.
First we will remove the minus sign at the power, the removal of this sign will convert the value into a fraction. For example, one of the law of indices states;
a^-n = 1/a^n
Applying this law to the value given;
9^-2 = 1/9²
Next is to find the square of 9
9² = 9×9 = 81
Therefore our final answer will give;
9^-2 = 1/9²
= 1/81
The answer is B. StartFraction 1 Over 81 EndFraction
