ordered $660 worth of microscopes and dissection kits for the new science lab. A total of 22 microscopes and 44th dissection kits ordered. Three times as much as a dissection kit

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.

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section

The graph represents f(x)=[x]+3. what is f(-2.2)?