well some more days passed and the preparation haven't really going smoothly.. doing assignments in class.. but nothing else.. of note.Did critical reasoning today..got 23 right and 7 wrong..
another day.. gone into the shadows.. splice with u...
How many powers 9^n with 0 ≤ n ≤ 4000 have leftmost digit 9, given that 9^4000 has 3817 digits and that its leftmost digit is 9.