What this question simply asks about is you write the numbers it gave you in only one digit by 10 to the power of n. Where n represents the number of shifts of the decimal point. And to get this number to be one digit, then you have to approximate. To approximate; you should always consider that less than 5 counts zero and 5 or more counts+1. Example: 5.3 is approximately 5 5.5 is approx. 6 5.9 is also approx. 6 and so on. So the final answers are; 1) 4*10^13 2) 5*10^-11 Please note that 10^positive integer will cause the decimal point to move to the right which means a number greater than 1, usually, while 10^negative integer means number smaller than 1, usually. Hope this helps.
