Please help, I dont understand im supposed to fill out here, the question is very broad and I was wondering if any one knows how to do this or has previously gotten this question on a test or something.

Can someone me with these two circle theorem questions asap?

Which of the following is the graph of y= square root -x-3

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )