Answer:
1/81
To write 9 to the power (-2) as a fraction in its simplest form, Isobel needs to understand that any number raised to a negative component can be written as a reciprocal of the same number raised by a positive component.
In this case, Isobel needs to find the reciprocal of 9² which is 1/9²
To simplify the answer, she needs to square the bases that give her
1/81
So she should write the above answer to represent 9 to the power -2.
