Question

The population of China is approximately 1.381x10^9, and the population of the US is approximately 3.23x10^8. About how many people live in both countries combined? Answer in scientific notation

Answer 1

1.704 x 10⁹ people

Explanation:

Population of China = 1.381 x 10⁹

Population of US = 3.23 x 10⁸

Problem:

Number of people in both countries combined = ?

Solution

To solve this problem, simply add them together;

Let us make the exponents the same for easy addition;

Population of China = 1.381 x 10⁹ = 13.81 x 10⁸

Poplation of US = 3.23 x 10⁸

Adding both:

(13.81 x 10⁸) + (3.23 x 10⁸)

⇒ (13.81 + 3.23) x 10⁸

⇒ 17.04 x 10⁸

⇒ 1.704 x 10⁹