3less than 5 times a number as an equation and find the answer to the equation
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What is the smallest integer n such that n\sqrt{2} is greater than 20

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? ( )

Find the cosine function that is represented in the graph.