Are the triangles below similar? Present an informal argument as to why they are or are not similar. (Please answer both)

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

In the rectangle below ac=30 units what is de

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