There are 12 inches in a foot, so just divide 540 by 12 to get your answer.
15 yards
5
The gray whale is actually black.
The offspring of whale (including the gray whale) is called a calf.
A whale
no
Blue Whale
Killer Whale
Eschrichtiidae
Fin whale. It is the 2 largest whale.
A Gray Whale
The marine mammal of California is the California Gray Whale.
The gray whale is not an endangered species. Listed as "Least Concern" by the IUCN.