Please help me asap!!

Ineed me i stuck and i don’t want to get it wrong

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

Find the missing factor. write your answer inexponential form.9^2=9^4×