A skyscraper has a mass of 2.2×105

Question

tons. Another skyscraper in the same town has a mass of 3.7×105
tons. What is the combined mass, in tons, of the two skyscrapers? Use scientific notation to express your answer to 1 decimal place.(1 point)

Answer 1

To find the combined mass of the two skyscrapers, you need to add their masses together:

1. Mass of the first skyscraper: \( 2.2 \times 10^5 \) tons
2. Mass of the second skyscraper: \( 3.7 \times 10^5 \) tons

Now, adding these two quantities:

\[ 2.2 \times 10^5 + 3.7 \times 10^5 = (2.2 + 3.7) \times 10^5 \] \[ = 5.9 \times 10^5 ; \text{tons} \]

Thus, the combined mass of the two skyscrapers is \( \boxed{5.9 \times 10^5} \) tons.

Answer 2

A certain insect is approximately 4×10−2
inches long. A second insect is about 1.3×10−1
inches long. What is the total length of the two insects in inches? Use scientific notation to express your answer to 1 decimal place.(1 point)