Rename the number 120,000 ten thousands

Because of your favorite lemonade it is $3.84 for 3 gallons. write this as an unit rate

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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.