A French restaurant used 555,580 ounces of cream last year. This year, due to a menu update, it used 45% less. How much cream did the restaurant use this year?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

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.

Is a square always, sometimes, or never a parallelogram