n is 3 but how did they get there?
12.5 = 100 * (1/2)^ndivide by 100:0.125 = (0.5)^nthis is equivalent to:\(n= \log_{0.5} 0.125\), which equals 3. (since 0.5 cubed = 0.125)
The bottom line is saying:. How many times do you have to cut 100 in half to get 12.5 ? ... 100 ==> 50 ==> 25 ==> 12.5 . Three times.
