Preform the indicated operation. √75 + √12

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? ( )

The surface area of the triangular prism is .

Could someone me with this question i’ve been stuck on it for 20 minutes