To find the combined mass of the two skyscrapers, you can simply add their masses together.
The first skyscraper has a mass of \(2.2 \times 10^5\) tons, and the second has a mass of \(3.7 \times 10^5\) tons.
So, we can calculate:
\[ (2.2 \times 10^5) + (3.7 \times 10^5) = (2.2 + 3.7) \times 10^5 \]
Now, add the coefficients:
\[ 2.2 + 3.7 = 5.9 \]
Therefore, the combined mass is:
\[ 5.9 \times 10^5 \text{ tons} \]
So, the final answer in scientific notation to 1 decimal place is:
\[ 5.9 \times 10^5 \]