Answer :

Final answer:

Blue whales can weigh significantly more than 20,000 pounds, and the correct weight is up to 400,000 pounds by using unit conversions from tons to pounds.

Explanation:

Blue whales are the largest animals on Earth, and they can weigh significantly more than the options of 2,000lbs and 20,000lbs provided. To determine the weight of a blue whale in pounds, we can use unit conversion of tons to pounds. Taking the given example that a humpback whale weighs about 40 tons, which converts to 80,000 pounds, we can understand that a blue whale could potentially weigh even more. For the largest blue whales, their weight can exceed 150 tons, which would be 300,000 pounds. However, the most accurate choice among the ones provided is 400,000 pounds since blue whales can weigh up to 200 tons, and using the unit equivalence of 2,000 pounds for 1 ton, we multiply 200 by 2,000 to reach this number.

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