What is the center of the circle for this equation:

x² + y² = 25

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

The candy store is having a 30% off sale. emma is going to buy $7.50 worth of candy. how much will she pay after the discount

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?