Well it is triples you can tell that it is a division question. So triples means by 3.
The equation is 2,551,500 = d X 3^6. So, now 2,511,500 / 729 is your final answer, 3,500. Hope it helps :)
"A" I think... Sorry if its not right...
Oranelles carry out specific functions within the cell
In this situation, the rabbit is the primary consumer because it feeds off the producer (grass) and is eaten by the secondary consumer (snake).