1 The circumference of a circular plot of land is increased by 10%. What is the best estimate of the total percentage that the area of the plot increased?

(1) 10%     (3) 25%
(2) 21%     (4) 31%

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3 Fractal geometry uses the complex number plane to draw diagrams, such as the one shown in the accompanying graph.

Which number is not included in the shaded area?

(1) -0.5i               (3) -0.9
(2) -0.5 - 0.5i       (4) -0.9 - 0.9i
 

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5 The center of a circular sunflower with a diameter of 4 centimeters is (-2,l). Which equation represents the sunflower?

(1) (x - 2)2 + (y + 1)2 = 2
(2) (x + 2)2 + (y - 1)2 = 4
(3) (x - 2)2 + (y - 1)2 = 4
(4) (x + 2)2 + (y - 1)2 = 2

 

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