If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 19 inches, ? = 90°, A = ?
A. 29.83 in2
B. 14.92 in2
C. 566.77 in2
D. 283.39 in2
Answer: D
Mathematics
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Find the domain of the radical function. Write it in interval notation.g(x) = 
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A. [4, ?) B. (-?, ?) C. [0, 4] D. [0, ?)
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Use the prime factorization method to find the LCM of the variable expressions.9a, 27ab, 33b
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Solve the system.x2 + 4xy + 2y2 = 1x2 - 4xy - 2y2 = 1
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Mathematics