The regular price of a tablet case is $38.45. during a sale, the case was marked as 25% off. what was the approximate price of the case during the sale? the regular price of a tablet case is $38.45. during a sale, the case was marked as 25% off. what was the approximate price of the case during the sale? a.) $1.54 b.)$9.61 c.)$28.84 d.)$38.70

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.