Question

The population of China is approximately 1.381 × 10^9, and the population of the United States is approximately 3.23 × 10^8. About how many people live in both countries combined? Express your answer in scientific notation.

Answer 1

Answer:

The population of China: 1.381 × 10^9=13.81 × 10^8

The population of the United States: 3.23 × 10^8

Total: 13.81 × 10^8 + 3.23 × 10^8 = (13.81 + 3.23) × 10^8 = 17.04 × 10^8

= 1.704 × 10^9

Step-by-step explanation:

Answer 2

The number of people living in both countries is an illustration of addition operation.

About $\mathbf{17.04 \times 10^8}$ people live in both countries

From the question, we have the following highlights

$\mathbf{China = 1.381 \times 10^9}$

$\mathbf{US = 3.23 \times 10^8}$

So, the population living in both countries is:

$\mathbf{Total = China + US}$

Substitute known values

$\mathbf{Total = 1.381 \times 10^9 + 3.23 \times 10^8}$

Factor out 10

$\mathbf{Total = 1.381 \times 10 \times 10^8 + 3.23 \times 10^8}$

$\mathbf{Total = 13.81 \times 10^8 + 3.23 \times 10^8}$

Factor out 10^8

$\mathbf{Total = (13.81 + 3.23 )\times 10^8}$

$\mathbf{Total = 17.04 \times 10^8}$

Hence, about $\mathbf{17.04 \times 10^8}$ people live in both countries

Read more about scientific notation at:

https://brainly.com/question/1705769