Question

In 2008, there were 6.7 × 109 people living on earth. What is that number in standard notation?

A.) 6,700,000
B.)6,700,000,000
C.)67,000,000
D.)67,000,000,000

Answer 1

B.)6,700,000,000

Explanation:

SO when you have to transform from the scientific notation into standar notation, you just have to move the decimal point to the right the number of positions that the scientific notation has as the exponent, in this case it is 9, so you move one position the decimal point to the right to make the number 67, and then add 8 zero´s to the right:

6,700,000,000

As you can see you moved the decimal point 9 positions to the right.

So that´s how you can convert scientific notation to standard notation.

Answer 2

B) 6,700,000,000 people.

Explanation:

We have been given that in 2008, there were
`6.7* 10^9` people living on earth. We are asked to convert our given population in standard notation.

While changing scientific notation to standard notation we just move the decimal as many times as the exponent indicates. We can see that our exponent is 9, so we will move the decimal to 9 places right.

`6.7* 10^9=6.7* 1000000000`

`6.7* 10^9=6700000000`

Therefore, there were 6,700,000,000 people living on earth and option B is the correct choice.