Question

I need help understanding how to get the answer.

Answer 1

-157.87

Explanation:

1) the rules are:

`log_a(bc)=log_ab+log_ac;`

and

`log_ab^c=c*log_ab.`

2) according to the rules above:

`log_7(yz^8)=log_7y+8log_7z=-6.19-8*18.96=-157.87.`