Segment CD is the perpendicular bisector of segment AB at E. Which pair of segments does not have to be congruent?

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

Identify the graph of y = ln x + 1.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?