BRAINLIEST PLUS POINTS
over the complete assessment period, Jenny averaged 35 out of a possible 40 marks for her eight math tests. When she was checking her files, she could find only seven of the test. For these she scored 29, 36, 32, 38, 35, 34 and 39. How many marks did she score for the eighth test?
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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.