Question

If the characteristics of ${\log }_{10}0.0000739$ is $a$, then value of $\left[a\right]$ is
(where [.] denotes the greatest integer function)

• A. $-4$
• B. $-5$
• C. $-6$
• D. $-7$

Answer 1

The correct option is B $-5$

Given ${\log }_{10}0.0000739$
Here, the number of zeroes after decimal and before any significant digit is $4$.
$\therefore$ The characteristics $=-4-1=-5$
$a=-5\Rightarrow \left[a\right]=-5$