91Ó°ÊÓ

We need to write$120000$in scientific notation.

First of all, moving the decimal place so the is only one number on the left side of the decimal point

$120000→1.20000$

Now, account for the movement using the powers of $10$, since we have moved five places to the left, we will include.

We need to write$0.00000034$in scientific notation.

Firstly we will move the decimal place so there is only one number on the left side of the decimal point

$0.00000034→0000003.4$

Now, accounting for the movement using the power of $10$, since we have moved seven places to the right, we will include

${10}^{\left(-7\right)}=3.4×{10}^{\left(-7\right)}$.

We need to write$0.066$in scientific notation.

Firstly we will move the decimal place so there is only one number on the left side of the decimal point

$0.066→06.6$

Now, accounting for the movement using the power of $10$, since we have moved seven places to the right, we will include

${10}^{\left(-2\right)}=6.6×{10}^{\left(-2\right)}$.

We need to write$2700$in scientific notation.

Firstly we will move the decimal place so there is only one number on the left side of the decimal point

$2700→2.700$

Now, accounting for the movement using the power of $10$, since we have moved seven places to the right, we will include

${10}^{\left(3\right)}=2.7×{10}^{\left(3\right)}$.