Really need with this question solve with work much appreciated

Arandom number generator is used to model the patterns of animals in the wild this type of study is called

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?