Write the standard form of the equation of the circle described.Center (2, 1), r = 

A. (x + 2)2 + (y + 1)2 = 
B. (x - 2)2 + (y - 1)2 = 
C. (x + 2)2 + (y + 1)2 = 
D. (x - 2)2 + (y - 1)2 = 

Answer: D

Mathematics

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Use technology to calculate det A.A = 

A. 16 B. -56 C. -16 D. 176

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Use the product rule to simplify the expression. Assume that the variables can be any real number.

A. x + 8
B. -
C.
D. -x - 8

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Solve the equation. Give an approximate solution to four decimal places.74x = 2.4

A. {1.7098} B. {0.0902} C. {1.7996} D. {0.1125}

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