1. The problem statement, all variables and given/known data The paper folding problem was a well-known challenge to fold paper in half more than seven or eight times, using paper of any size or shape. The task was commonly known to be impossible until April 2005, when Britney Gallivan solved it. A sheet of letter paper is about 0.1mm thick. On the third fold it is about as thick as your fingernail. On the 7th fold it is about as thick as your notebook. If it was possible to keep folding indefinitely, how many folds would be required to end up with a thickness that surpasses the height of the CN Tower, which is 533 m? (The answer at the back of my book said it was 23 folds but I don't know how they got to that answer) 2. Relevant equations The formula for an exponential function is: y=a(b^x) 3. The attempt at a solution Knowing the height of the CN Tower I tried plugging that into a function using my knowledge of the paper thickness. 533 = 0.0001(b^x) I then tried to solve for (b^x) 533/0.0001 = b^x 5 530 000 = b^x At this point I'm not sure of what to do or if I did the steps correctly.