Hi guys im here for another question
Can you give me the answers?

The parabola opens: y=√x-4 (principal square root) up down right left

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

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*