Wezi has sixty-eight $1-bills. he takes the $1-bills to the bank to exchange them for $5-bills. how many $5-bills does wezi get?

Vinay constructed this spinner based on the population of teachers at his school according to vinays model what is the probability that he will have a male history teacher two years in a row

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points