A large multiplex movie house has many theaters. The largest theater has 48 rows. There are 15 seats in the first row. Each row has three seats more than the previous row. How many total seats are in this theater?

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