Solve.
A. 
B. 
C. 
D. none of these
Answer: A
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Solve the equation 
for x.
?
A. There is no solution.
B. 
C. ?
D. ?
Use the method of undetermined coefficients to solve the differential equation.y'' - 6y' + 13y = 2e-4x
A. y = e3x(C1 cos 2x + C2 sin 2x) + 
e-4x
B. y = C1e3x + C2e2x + 
e-4x
C. y = e3x(C1 cos 2x + C2 sin 2x) + 
e-4x
D. y = C1 cos 3x + C2 sin 2x + 
e-4x
Solve the problem.The cost C, in dollars, of having a dinner party catered by Elaine's Kosher Catering Company can be approximated by the function 
where n is the number of people attending the party. The banquet hall where the dinner will be located can hold no more than 150 people. Find the domain of the function.
A. [7, 55] B. (-?, 150] C. (-?, ?) D. [0, 150]
Test the vector field F to determine if it is conservative.F = xyi + yj + zk
A. Not conservative B. Conservative