Which number represents the probability of an event that is certain to occur?

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

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

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab