Question

if u say answer i will make u brainlist​

Answer 1

Answer:

1/7.987 log is your answer

Answer 2

$log_{10}7=a$

$log_{10}(\frac{1}{70})$

$= -log_{10}70$

$=-(log_{10}7+log_{10}10)$

$=-(log_{10}7+1)$

$= -a-1$