22 Jun 2008, 23:23 If n is a positive integer, is (1/10)^n < .01?a. n>2b. (1/10)^(n-1) <0.1And: D(1/10)^n < .01 if & only if (1/10)^n < (1/10)^2 if & only if n<2 St1: Is sufficient!In st2: (1/10)^(n-1) <0.1 - multiply by a 10 on both sides we get St1.