Question

Blue whales weigh approximately 4 x 10^5 pounds as adults, Orcas weigh approximately 2 x 10^4 pounds as adults. About how many times target ane blue whales than orcas

Answer 1

4x10^5 outside of scientific notation is 400,000, and 2x10^4 outside of scientific notation is 20,000, so you can just devide 400,000 by 20,000, getting 20. Thus you can conclude that a blue whale is 20x heavier that an orca.