Find the value of log

_{10}(frac{1}{40}), given that log_{10}4 = 0.6021-
**A.**

1.3979 -
**B.**

2.3979 -
**C.**

1.6021 -
**D.**

2.6021

##### Correct Answer: Option C

##### Explanation

log_{10}(frac{1}{40}) = log_{10} 1 – (log_{10}4 + log_{10} 10)

= 0 – 1.6021

= 1.6021