Sorr I'm dumb :P... of for meh

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

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?

Which of the following three dimensional figures has a circle as it’s base