Which equation shows the divison into zero property

Which of the following is the missing term, a2, of the geometric sequence in which a1=2 and a3=200

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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