A bank offers a 1% annual interest rate for a savings account. Aaron puts $3,100 into an account to save for college. How much will be in the account after a year?

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily

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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.