Seth is trying to find the unit price for a package of blank compact disc on sale at 10 for $5.49. find his mistake

Can any one me with the answers to these questions asap?

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2

What is the solution to the division problem below x3+x2-11x+4/x+4