Ron's factory is currently producing 30 chairs in a day. how many chairs will be produced if production is to be increased by 130%?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z

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.