7t-3t+4t-5t show working​

In the 30-60-90 triangle below side s has a length of and side r has a length

What does the relationship between the mean and median reveal about the shape of the data

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.