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

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,

The approximate value of this number is

The scientific form of this value is

Therefore, the correct option is C.

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

answer: idk

step-by-step explanation: