Find the specified domain.For f(x) = x2 - 1 and g(x) = 2x + 3, what is the domain of (f - g)?
A. (-1, 1)
B. [1, ?)
C. (-?, ?)
D. [0, ?)
Answer: C
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Use implicit differentiation to find dy/dx.x = sec(9y)
A. 9 sec(9y) tan(9y)
B. 
cos(9y) cot(9y)
C. 
sec(9y) tan(9y)
D. cos(9y) cot(9y)
Find the potential function f for the field F.F = (y - z)i + (x + 2y - z)j - (x + y)k
A. f(x, y, z) = xy + y2 - xz - yz + C B. f(x, y, z) = xy + y2 - x - y + C C. f(x, y, z) = x(y + y2) - xz - yz + C D. f(x, y, z) = x + y2 - xz - yz + C
Evaluate the derivative at the given value of x.y = -3x2 + 5x; x = 7
A. -22 B. -147 C. -7 D. -37
Solve the problem.Electrical wire is being wound around a drum with radius of 1.21 meters. How much line would be wound around the drum if it is rotated through an angle of 
Round your answer to two decimal places.
A. 7.05 m B. 7.35 m C. 7.25 m D. 7.15 m