At the aquarium, there are twice as many sharks as stingrays. If there are 28 stingrays, how many fish are there? Let's answer step by step:
If sharks are twice the number of stingrays, then the number of sharks at the aquarium is 2 sharks / stingray * 28 stingrays = 56 sharks. The number of fish in the tank is 56 sharks + 28 stingrays = 84 fish. The answer: 84.