Question 771323
You basically stick the decimal point between the first two digits, then because it takes 3 moves to the right to get it back to 2643, this means that the base is 2.643 and the exponent is 3.


So this means


<img src="http://latex.codecogs.com/gif.latex?\huge&space;2643&space;=&space;2.643&space;\times&space;10^{3}" title="\huge 2643 = 2.643 \times 10^{3}" />