Find the gradient field of the function.f(x, y, z) = z sin (x + y + z)
A. ?f = z cos(x + y + z)i + z cos(x + y +z)j + (sin(x + y + z) + zcos(x + y + z))k
B. ?f = cos xi + cos yj + (sin z + z cos z)k
C. ?f = -cos xi - cos yj + (sin z - z cos 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: A
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Construct a truth table for the statement.~(~(q ? r))
A. 
| T | T | F |
F T F
F F T
B.
| T | T | T |
F T F
F F F
C.
| T | F | T |
D.
| T | T | T |
F T T
F F F
Solve the formula for the specified variable.I = 
for n
A. n = 
B. n = 
C. n = 
D. n = IR(Ir - E)
A small country consists of four states (State 1, State 2, State 3, and State 4). The total population of the country is 200,000. The standard quotas are q1 = 64.8, q2 = 89.9, q3 = 39.6, and q4 = 5.7 respectively.Which of the following numbers can be used as a modified divisor under Webster's method?
A. 1000 B. 1004 C. 990 D. 1001 E. none of these
Graph the system of inequalities.2x + y ? 4 y - 1 ? 0
A. 
B. 
C. 
D. 