What is the least number of digits (including repetitions) needed to express 10^200 in decimal notation?	Choose the correct choice from the following:  A) a) 201  B) b) 100  C) c) 101  D) d) 1000  E) e) 1001
10^n is a decimal number with a 1 followed by n zeros.   So 10^200 will include 200 0's + 1 digit for 1 = 201   So the answer is a) 201
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What is the least number of digits (including repetitions) needed to express 10^200 in decimal notation?