You probably made an error while writing the options.
The correct ans is: 
Entry Fee for the player is $11.
Player is charged $1 for each game played. So for x games played, the charges will be $ x.
So, total charges for x games played will be:
T(x) = 11 + x
Average Cost per game played = Total Cost/Total Games played
So,
For this, we will be using the pythagorean theorem, which is
. Since we have the hypotenuse and one of the legs, we can solve for the other leg. Our equation will look like this: 
Firstly, solve the exponents: 
Next, subtract 3600 on both sides: 
Next, square root both sides, and your answer will be x = 80 units
You have to do 12 divided by 20 to get ur answer which is 0.6 or 6
Answer:
D
Step-by-step explanation:
I had a test and this is the answer. :)