Given that the logarithm of a number is \(\bar{1}.8732\), find, correct to 2 significant figures the square root of the number.
A
0.29
B
0.75
C
0.86
D
0.93
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
Let the number = d.
\(\log d = \bar{1}.8732\)
\(\log \sqrt{d} = \frac{\bar{1}.8732}{2}\)
= \(\frac{\bar{2} + 1.8732}{2}\)
= \(\bar{1}.9366\)
\(\therefore \sqrt{d} = Antilog (\bar{1}.9366)\)
= 0.86
Source: WAEC / JAMB / NECO Classroom Archive (Record #26434)