Whether or not the expression shows wxponetial growth or decay

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? ( )

Brent wants to know what is 5 x 1/2

15/16 as a decimal rounded to the nearest hundredth