The Solution.
The given equation is

Substituting 11 for x, we can get the value of y.

Hence, the value of y is 18.
A straight line extending from the center of a circle or sphere to the circumference or surface.. of a circle is a half the diameter.
You would probably find it on the altitude or height.
Answer: For the first on its a total of $5 dollars for the second one its a total of $3.45 cents
So all in total $8.45