Find all solutions of the equation in the interval [0, 2?).csc 
= 
A. 
B. 
C. 
D. {?}
Answer: D
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Find the domain and range of the function.g(z) = 7 - 
A. D: (-?, ?), R: (-?,7] B. D: (-?,0], R: [7,?) C. D: (-?,7], R: (-?, ?) D. D: [0,?), R: (-?,7]
Find all the first order partial derivatives for the following function.f(x,y,z) = xe(x2 + y2 + z2)
A. 
= (1 + 2x2) e(x2 + y2 + z2); 
= xy2e(x2 + y2 + z2); 
= xz2e(x2 + y2 + z2)
B. 
= (1 + 2x2) e(x2 + y2 + z2); 
= 2xye(x2 + y2 + z2); 
= 2xze(x2 + y2 + z2)
C. 
= 2x2e(x2 + y2 + z2); 
= xye(x2 + y2 + z2); 
= 2xze(x2 + y2 + z2)
D. 
= (1 + 2x2) e(x2 + y2 + z2); 
= xe(x2 + y2 + z2); 
= xe(x2 + y2 + z2)
Factor the polynomial by grouping.x2 + 7x + 3x + 21
A. (x - 7)(x - 3) B. (x + 7)(x + 3) C. prime D. (x - 7)(x + 3)
Solve the problem.A repair company's charge for repairing a certain type of copy machine fits the model 
where y is the number of dollars charged and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $50? (Round to the nearest minute.)
A. 158 min B. 73 min C. 4 min D. 0 min