Discussion
If a number has no zero immediately after decimal point, characteristic is
Answer: B
For a number less than 1, the characteristic is negative: it is one more than the number of zeros immediately after the decimal point, taken with a minus sign.
With no such zeros, as in 0.5 or 0.842, the characteristic is \( -1 \), usually written \( \bar{1} \).
\[ \log 0.842 = \bar{1}.9253 = -1 + 0.9253 \]
The mantissa stays positive; only the characteristic carries the sign.
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