Calculate .A = 

A. -20
B. 0
C. 1
D. 74

Answer: B

Mathematics

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Solve the problem.The rectangle shown is golden with short side of length 20. Estimate the length of the diagonal.

A. 323.61 B. 52.36 C. 32.36 D. 38.04 E. none of these

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Solve the equation on the interval [0, 2?).cos - cos = 1

A. , 
B. , 
C. , 
D. , 

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Evaluate.815/4

A. 243 B. 19,683 C. 6561 D. 2187

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Write the equation of the circle in standard form. Find the center and radius. Then sketch the graph.x2 + y2 + 2x - 48 = 0

A. (x - 1)2 + y2 = 49
(h, k) = (1, 0), r = 7

B. x2 + (y - 1)2 = 49
(h, k) = (0, 1), r = 7

C. (x + 1)2 + y2 = 49
(h, k) = (- 1, 0), r = 7

D. x2 + (y + 1)2 = 49
(h, k) = (0, - 1), r = 7

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Mathematics