Hello!
The fraction whose denominator is the number 1000 is called the thousandth, then we have:
12 thousandths
[tex] = \dfrac{12}{1000} [/tex]
[tex] = 0,012 [/tex]
[tex] = \boxed{\boxed{1,2*10^{-2}}}\Longleftarrow(scientific\:\:notation)\end{array}}\qquad\checkmark [/tex]
Note: The comma was positively moved to 2 decimal places to the left, forming a conventional number.
ps: The order of magnitude of a measurement is an estimate of the base power 10 closest to a given measurement. It must be known that the scientific notation according to the scientific notation rule, before the comma can only have the numbers 1 to 9.
I Hope this helps, greetings ... DexteR! =)
