You move the decimal point to the right, as many digits as the exponent states, filling out with zeroes if necessary. If the exponent is negative, you move the decimal point to the left.
Example: 1 light-year has about 9.5 x 1012 kilometers. Moving the decimal point 12 digits to the right, you get: 9,500,000,000,000 kilometers.
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28.6 is the standard notation. The standard form(also called scientific notation) is: 2.86 × 101
The standard number 0.09 in scientific notation is: 9 × 10-2
1,150 in Scientific Notation = 1.15 x 103
It is one of the great ironies of Mathematics that "standard" is not standard. In the US, standard notation is a number, like 953, which would be written in scientific notation as 9.53 x 10^2 In Britain, scientific notation is also known as "standard form."
It is: 3.992*10^11 in scientific notation