Let N = (0.7214 × 20.37)/(608). Take the logarithm of both sides.

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Question 11: Use logarithms table to evaluate: $\frac{0.7214 \times 20.37}{608}$

Let $N = \frac{0.7214 \times 20.37}{608}$ .
Take the logarithm of both sides.
$\log N = \log(0.7214) + \log(20.37) - \log(608)$
Find the logarithms of each number using logarithm tables.
$\log(0.7214) = \bar{1}.8582$ $\log(20.37) = 1.3090$ $\log(608) = 2.7839$
Perform the addition and subtraction of the logarithms.
$\log N = \bar{1}.8582 + 1.3090 - 2.7839$
First, add the positive logarithms:
$\bar{1}.8582 + 1.3090 = (-1 + 0.8582) + (1 + 0.3090) = 0.8582 + 0.3090 = 1.1672$
Now, subtract the logarithm of the denominator:
$\log N = 1.1672 - 2.7839$ $\log N = -1.6167$
Convert the negative logarithm to the standard characteristic-mantissa form.
$-1.6167 = -2 + 0.3833 = \bar{2}.3833$
Find

Let N = (0.7214 x 20.37)/(608). Take the logarithm of both sides.