First, this is 6th-grade math so don't click off, what is the average time of 5 minutes, 4 minutes and 30 seconds, 6 minutes
I don't have all day so please be quick, i will give brainiest but you must be simple with answer

Choose the more precise measurement. 26.4 cm or 8.39 cm

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

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.