Answer:

Step-by-step explanation:
The given equation is
.
We take logarithm of both sides to base 2 to get:

Apply the power rule of logarithms to get:

We now apply the change of base formula:





To the nearest thousandth, 
The answer is
Option A and B
Answer:

Step-by-step explanation:
I FOUND YOUR COMPLETE QUESTION IN OTHER SOURCES.
SEE ATTACHED IMAGE.
For this case, what we are going to do is study each part separately.
Left diagram:
In this diagram you show three quarters of the hours.
We have then:
(3/4) * (12) = 9
Answer:
You teach 9 hours.
Right diagram:
In this diagram you teach half of the hours.
We have then:
(2/4) * (12) = 6
Answer:
You teach 6 hours