Question

In 2010, the continent of South America had a population of 395, 280, 204 Which of the following is the closest estimate of this number?
O 3 x 10^8
O 4 x 10^7
O 4 x 10^8
O 4x 10^9

Answer 1

Given:

The population of continent of South America in 2010 is 395, 280, 204.

To find:

The closest estimate of this number.

Solution:

We have,

$Population = 395, 280, 204$

The approximate value of this number is

$Population \approx 400, 000, 000$

The scientific form of this value is

$Population = 4\times 10^8$

Therefore, the correct option is C.