The common log is base 10.
Got this problem to do....... don't know where to start. Need help!
If 9^(9^{9}) is multiplied out and typed on a strip of paper, 3 digits per centimeter, about how many kilometers long would the paper be?
A hint says use the common log to determine the number of digits the number has, but I don't understand what that means
So I'd solve for x and then use a conversion factor to get the length of the paper? Also, where does the 10^(x-1) come from?