Question

I need help understanding how to get the answer.

Answer 1

Answer:

-157.87

Step-by-step 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:

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