12 grams (g) of a chemical are added to a metal. The amount A, in grams, of the chemical
remaining during a reaction with a metal plate decreases by 0.5 g per second. If instead the plate
were dissolved, the amount A', in grams, of chemical remaining would decrease by half of itself
every 4 seconds. How many grams greater is A than A' after 12 seconds?
2 seconds. He count A', in en al plate decre