Evaluate the expression or indicate that the root is not a real number.-
A. -4
B. -3
C. 3
D. Not a real number
Answer: B
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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 = -z cos(x + y + z)i - z cos(x + y +z)j + (sin(x + y + z) - zcos(x + y + 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
Construct a frequency polygon.
A. Frequency
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B. Frequency
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Solve the problem.The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. Suppose the the intensity is 8000 units at a distance of 2 miles. What will the intensity be at a distance of 3 miles? Round your answer to the nearest unit.
A. 3520 units B. 3539 units C. 3556 units D. 3582 units
Perform the division.
A. 2x3 - 3x2 + 5x - 3 B. 2x3 - 3x2 - 5x + 3 C. 2x3 - 3x2 - 5x - 3 D. 2x3 + 3x2 - 5x - 3