Given expression : 
.
We need to apply power property of logs to rewrite it.
According to log rule of exponents:
If we compare given expression with the rule the exponent part is f, base is 6.
Therefore, we need to bring exponent f in front of log.
Therefore, 
.
<h3>And correct option is second option
</h3>
Answer:
42 and 21 are composite numbers
lox (x) = -5
rewrite the equation in exponential form:
10^-5 = x
10^-5 = 1/10000
1/10000 = 0.00001
That is the correct answer.
6.15x = 123
123 ÷ 6.15 = 20
x = 20 hours.
A=3 and B=1. comment if you would like me to explain how I did it.
