The average weight of a blue whale is 4x10^5 pounds. The average weight of an elephant is 1x10^4 pounds. Approximately how many times heavier is a blue whale than an elephant in pounds?

To find the number of times heavier a blue whale is compared to an elephant, we need to divide the weight of the blue whale by the weight of the elephant:

(4x10^5 pounds) / (1x10^4 pounds) = 40

Therefore, a blue whale is approximately 40 times heavier than an elephant in pounds.