Simplify the expression.
+ 
A. 
B. 
C. 
D. 
Answer: B
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Use the pH scale to answer the question.If the pH of a solution increases by 4, how much does the hydrogen ion concentration change? Does the change make the solution more acidic or more basic?
A. Decreases by a factor of 10,000; more basic B. Increases by a factor of 40; more acidic C. Increases by a factor of 10,000; more acidic D. Decreases by a factor of 40; more basic
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
Find the smallest value of N that will make the inequality hold for all n > N.
< 10-2
A. 16 B. 14 C. 15 D. 13
Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.6
+ 6i
A. 12( cos 300° + i sin 300°) B. 12( cos 330° + i sin 330°) C. 12( cos 60° + i sin 60°) D. 12( cos 30° + i sin 30°)