Find the gradient field F of the function f.f(x, y, z) = z sin (x + y + z)
A. F = cos xi + cos yj + (sin z + z cos z)k
B. F = -cos xi - cos yj + (sin z - z cos z)k
C. F = -z cos(x + y + z)i - z cos(x + y +z)j + (sin(x + y + z) - zcos(x + y + z))k
D. F = z cos(x + y + z)i + z cos(x + y +z)j + (sin(x + y + z) + zcos(x + y + z))k
Answer: D
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Solve the given differential equation (where the function is subject to the given conditions) by using Laplace transforms.y" + 16y = 0, y
= 0, y' 
= 1
A. y = 
cos 4t
B. y = 
sin 4t
C. y = sin 4t
D. y = cos 4t
Simplify. Leave your answer in exponent form.(510)(530)
A. 5300 B. 2540 C. 540 D. 520
Determine if the pair of line segments or angles is congruent.Determine if the pair of segments is congruent. Use a ruler. 
A. Yes B. No
Ohm's Law for the current I in a circuit with voltage E, resistance R, capacitance reactance XC, and inductive reactance XLis 
Use this law to solve the problem.Find R if 
and 
A.
1 +  i |
B.
 + i |
C.
| 1 + i |
D.
+ 
i