Triangle a b c is shown with its exterior angles. line b a extends through point d. line a b extends through point e. line a c extends through point f. which angle’s measure is equal to the sum of the measures of ∠bac and ∠bca? ∠cba ∠cbe ∠dac ∠bcf

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