A seagull is flying 20 feet above sea level while a shark is swimming 30 feet below sea level. What is the distance between the seagull and the shark?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

Construct the graph that models the given situation

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.