The bottom of a ladder must be 3 feet from a wall. the ladder is 12 feet long. how far above the ground does the ladder touch the wall

How do you answer this question? (step by step)

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

What is the binomial expansion of (2x-3)^5