Find a polar equation of the conic with its focus at the pole.
?
Conics Eccentrity Directrix Parabola 
?
?
A. 
B. 
C. ?
D. 
E. 
Answer: D
Mathematics
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Use the trapezoidal rule to find the area.On an aerial photograph a region the widths of an area were measured at 
intervals as shown in the following table. Find the area.
A. 9.5 mi2 B. 13 mi2 C. 16 mi2 D. 11 mi2
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Solve.Find the sum of the first 43 terms of the arithmetic sequence: 2, 4, 6, 8, . . .
A. 1935 B. 88 C. 1902 D. 1892
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Solve the problem.Find the perimeter of the polygon with the following vertices. Round to the nearest hundredth. A(1, 1), B(2, 5), C(5, 4), D(4, 2), E(3, 2)
A. 10.52 B. 12.76 C. 11.52 D. 14.64
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Find the indicated intersection or union.Let A = {4, 9, 11, 17, 21} and B = {9, 17, 21, 30}. Write the set A ? B.
A. {9, 17, 21} B. {9, 17, 21, 30} C. {4, 9, 11, 17, 21, 30} D. {4, 9, 17, 21}
Mathematics