What’s the slope for RS

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? ( )

Answer this question only if you know the answer! 30 points and

How many zeros does the function f(x)=4x3-x2+1 have