Question 882731
Hello! For each time you double the stack, you are essentially multiplying the thickness of the stack by 2. Therefore, by doubling the stack 20 times, you are multiplying by 2 twenty times, which you can simplify to multiplication by {{{2^20}}}. Thus, the thickness of the stack after doubling it 20 times is {{{0.01 * 2^20 = 104857.6}}}, so your final thickness is 104857.6 inches.
I hope this helps! =)