Add Numbers in Scientific Notation Practice

Question

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Question
A skyscraper has a mass of 2.2×105
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)
Remaining Attempts : 3

Answer 1

To combine the masses of the two skyscrapers given in scientific notation, we can simply add the two values together.

1. The first skyscraper's mass: \( 2.2 \times 10^5 \) tons
2. The second skyscraper's mass: \( 3.7 \times 10^5 \) tons

To add these, we add the coefficients (the numbers in front) while keeping the same power of ten:

\[ (2.2 + 3.7) \times 10^5 = 5.9 \times 10^5 \]

So, the combined mass of the two skyscrapers is:

\[ 5.9 \times 10^5 \text{ tons} \]

This answer is in scientific notation with one decimal place as requested.