Posted by lizzie on .
people are entering a room with five doors and come out, how many ways are there if they canâ€™t go out from the door they went in.

math 
jane,
how do you find the area of a square

math lizzie 
PsyDAG,
If a person comes in one of the five doors and can only leave from another door, that means there are four ways that person can leave.

math jane 
PsyDAG,
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
Multiply the height times width. With a square, the sides are equal, so area = s^2 (side squared).