A trade magazine routinely checks the​ drive-through service times of​ fast-food restaurants. Upper A 90​% confidence interval that results from examining 692 customers in one​ fast-food chain's​ drive-through has a lower bound of 169.9 seconds and an upper bound of 173.3 seconds. What does this​ mean?

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

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.