sec3.09
9. In the figure above, \[AD = 1\] and \[DC = \sqrt{3}\]. What is the value of \[z\]?
(A) 15
(B) 20
(C) 25
(D) 30
(E) 35

10. If 30 percent of 40 percent of a positive number is equal to 20 percent of \[w\] percent of the same number, what is the value of \[w\]?
(A) 80
(B) 60
(C) 50
(D) 15
(E) 10
sec3.11
11. In the figure above, rectangle \[ABCD\] is made up of seven nonoverlapping rectangles. The two smallest rectangles have the same area. Each of the other rectangles has twice the area of the next smaller rectangle. The area of the shaded rectangle is what fraction of the area of rectangle \[ABCD\]?
(A) \[\frac{1}{128}\]
(B) \[\frac{1}{64}\]
(C) \[\frac{1}{32}\]
(D) \[\frac{1}{16}\]
(E) \[\frac{1}{7}\]

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