Question

The average piece of copy paper has a thickness of 3.81 x 10^-3 inches. What is the thickness of a ream of 50 sheets of paper written in standard decimal notation

Answer 1

Formula b^-n =1/b^n
10^-3 = 1/10^3 = 1/1000 or 0.001

3.81 x 0.001 = 0.00381 = 1 sheet

50 x 0.00381 = 0.1905 = 50 sheets

Answer = 0.1905