0.9 in scientific notation is 9.0*10*^-1
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In exponential form it would be 3.75 x 10 to the power of 9 . In scientific notation it would be 3.75E+09
XXIIX-IX-IXImproved Answer:-In today's notation of Roman numerals it is: XXVIII-IX-IX
0.20 + 7 + 0.09 + 0.001 = 7.291
20 + 7 + 09 + 001 = 37
In today's notation: IX-VII-MCMLXXXI