The sides of aabc are 4.5 ft, 7.5 ft, and 9 ft long. the area of aabc is about 17 square feet. if adef has sides that are 6 ft,
10 ft, and 12 ft long, explain how to use the area of aabc to find the area of adef.
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In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

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.

Complete this sentence with the best of choices given