3.4 x 10 -4
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if the number is written like this, 4.372 x 104 than the number is written in scientific notation, because it is multiplied by ten to the power of something, and the number is less than ten, but 1 or more. if it is written like this than it is not in scientific notation. 43720. scientific notation makes it easier to read.
If it is written in scientific notation it will have x10 to a certain power if it is standard it won't
Scientific notation is always written as a number (between 1 and 10) multiplied by a power of ten. For example: 107.6 in scientific notation would be 1.076 x 102 notice how the first number is between 1 and 10 and it is being multiplied by a power of ten. So the example you gave is not written in the same format and is thus not written in scientific notation. If you were to write it in scientific notation you would multiply the two numbers and then convert the answer to scientific notation and write it as: 1.0602904 x 103
The sign of the exponent for a number written in scientific notation depends on whether it is a whole number or a fraction. 40 is 4 x 101 0.4 is 4 x 10-1
It is 1.82*10^4 in scientific notation