Troba l'expressió algebraica d'un nombre de quatre xifres, sabent que la xifra de les unitats es tres vegades la xifra de les desenes

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? ( )

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

What is the y intercept of f(x)=(1/2)^x?