PLZZ HELP IM STUPITT SORRY AND HURRY

If i have one apple and give you the apple, how many apples do i have?

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.