Answer: “A” Opportunity cost is “the value of an investment opportunity you pass up in order to take another investment opportunity .” It’s pretty much the sacrifice you make to do something else.
Ex. To earn volunteer hours, Billy decided not to go to Bob’s birthday party.
Answer:
1/9
Step-by-step explanation:
There are three places and three people.
Times them together for the total outcomes:
1/3 x 1/3= 1/9
Answer:
Solving the equation
by completing the square method we get 
Option B is correct option.
Step-by-step explanation:
We need to solve the equation
by completing the square method.
For completing the square method: we need to follow: 
We are given:

Solving by completing the square

We need to find ? in our case ? is 3 because 2*3= 6 and our middle term is 6x i,e 2(x)(3)=6x.
So, adding and subtracting (3)^2

So, solving the equation
by completing the square method we get 
Option B is correct option.