How do I do this? Don’t know what to do with the 50

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd