If log10 7 = a, then log10 (1/70)is equal to:

If log10 7 = a, then log10 (1/70)is equal to:

Quiz

Answer/Solution

- (1 + a)

Steps/Work

Explanation:
log10 (1/70)= log10 1 - log10 70
= - log10 (7 x 10)
= - (log10 7 + log10 10)
= - (a + 1).
ANSWER IS A