Final answer:
The Earth's population is 2,333 times larger than the United States' population, which means approximately 2.33 x 10³ times larger. The options given in the question do not include the correct answer, suggesting there might be a typo.
Step-by-step explanation:
The question asks us to compare the population of the world, given as 7 x 10⁹, with the population of the United States, given as 3 x 10⁶. To find out how many times larger the Earth's population is than the United States', we divide the world's population by the population of the United States.
Step 1: Write down the populations in scientific notation form.
World population = 7 x 10⁹
U.S. population = 3 x 10⁶
Step 2: Divide the world population by the U.S. population.
(7 x 10⁹) ÷ (3 x 10⁶) = (7 ÷ 3) x (10⁹ ÷ 10⁶) = (2.33) x (10³)
Step 3: Simplify the answer.
The Earth's population is approximately 2.33 x 10³ times larger than the United States' population. This means it is 2,333 times larger.
While none of the options provided in the question correctly corresponds to our calculations, it's important to note that usually individuals can make a mistake when transcribing numbers, especially when dealing with large numbers or scientific notation. It's possible there may have been a typo in the options presented.
Given the current and projected population trends, understanding the scale of population differences between specific countries and the world as a whole is an important aspect of demography, which can help inform public policy and global health initiatives.