Scientific Notation

1.0 × 10-4

or

1.0E-4

The scientific notation is 1.2 x 1012 (US name 1.2 trillion).

1.0203 × 10-3

Since the decimal place is between the leading nonzero digit and the adjacent digit, there is no need to shift a decimal point left/right. Therefore, 1.5 in Scientific Notation is 1.5 x 100

0.00000000016 = 1.6*10-10

5000000km can be written as 5.00 × 106 km in scientific notation.

0.00028 = 2.8e-4 or 2.8 x 10^-4

It is: 5.3*10^3

It is: 1.31*10^1

9 x 10^3

It is 6.79*10^-4 in scientific notation

Scientific notation is a way of representing numbers: it does not have any mass and so there are 0 lots of 0.8g in scientific notation.

1 x 1014

It is: 3.04*108 in standard form or scientific notation

Using scientific numbers means that you do not have a long string of preceding or trailing zeros in the number of interest.

27 x 10 to the -3

2.7*10^-3

‎1.25 x 10^4

There is no such law. "Scientific notation" is a convention (not a law), that lets you write very large or very small numbers in a brief way (without writing lots of zeros). You can find details, and examples, in the Wikipedia article on "Scientific notation".

1.00 x 10^0

It is 4.5/10^1 which can be written as 4.5*10.

In scientific notation it is: 9.3*10^7

What you are asking is not clear, but I think that you're asking, "Why do you use x10 with scientific notation (Correct me if I'm wrong). The x10 is used because if you multiply something by ten, the decimal place of the number moves one to the right. If you divide a number by ten the decimal place moves one to the left. The x10(to whatever number) is just an easier way to symbolize that decimal place moving

It is 4.05*108

It is: 1,200,000 = 1.2*106 in scientific notation