Find the domain of the function.f(x) = 
A. {x|x ? 9}, or [9, ?)
B. {x|x ? -9}, or [-9, ?)
C. {x|x ? 9}, or (-?, 9) ? (9, ?)
D. all real numbers, or (-?, ?)
Answer: B
Mathematics
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- 5
A. 5 B. -5 C. -1 D. -9
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A. (-?, 0] or [7, ?) B. [0, 7] C. (-?, -7] or [0, ?) D. [-7, 0]
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Evaluate the determinant.
A. -16 B. 0 C. 1 D. 56
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Solve the problem.Use a tangent function to estimate the grade resistance of a 
car travelling on a 2.1° grade. Round your answer to the nearest pound.
A. 198 lb B. 99 lb C. -4617 lb D. -2308 lb
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