A skyscraper has a mass of 2.2x10^5 tons. Another skyscraper in the same town has a mass of 3.7x10^5 tons. What is the combined mass, in tons, of the two skyscrapers? Use scientific notation to express your answer to 1 decimal place.
1 answer
The combined mass of the two skyscrapers is (2.2x10^5 + 3.7x10^5) tons = (5.9x10^5) tons.