the answer is 10:20.
Hint for the future: be sure to write in the full problem. I only knew the answer because I had to do it myself, but people need more context if they are going to help you.
When you see % next to a number, you multiply it by .01.
10 becomes .1
10.5 becomes .105
220*.1=22, so this is the 10% off
220*.105=23.1, so this is the 10.5% service charge.
220-22+23.1=$221.10 for the ticket.
You can put "3 or 4" which is in your multiple choice :)
Answer: I have included an image of the correct answer.
They are skew lines
X^2+y^2=9
because it is at the origin and radius is 3