The sale rack at the department store said that an additional 30 percent discount would be taken on all items. If a dress on the sale rack had an original price of $86 and was already marked down by 25 percent, what is final cost of the dress before taxes? $38.70 $45.15 $47.30 $60.20

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

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.

Which of these angles are supplementary? a. 100o and 90o b. 78o and 102o c. 54o and 146o d. 12o and 78o