Use the formula to find the missing quantity for the given conditions. The formula E=IZ where E represents voltage, I represents current, and Z represents impedance (a measure of opposition to a sinusoidal electric current), is used in electrical engineering. The variable is a complex number.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
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Find the component form of the specified vector.The unit vector that makes an angle -5?/3 with the positive x-axis
A. 
B. 
C. 
D. 
Tell whether the angle is acute, right, obtuse, or straight.
A. Obtuse B. Acute C. Right D. Straight
Convert the objective function into a maximization function.Minimizew = y1 + 2y2 + 3y3subject to:4y1 + 3y2 + y3 ? 25 y1 + 2y2 + 4y3 ? 39 y1 ? 0, y2 ? 0, y3 ? 0
A. Maximize z = -y1 - 2y2 - 3y3 B. Maximize z = -y1 - 2y2 - 4y3 ? 39 C. Maximize z = -4y1 - 3y2 - y3 ? 25 D. Maximize z = y1 + 2y2 + 3y3 - y4
A carpenter’s square can be used to find the distance across a pond, as follows. Place the square on the top of a pole which is tall enough to allow you to sight along one side of the square to the opposite side of the pond. Fix the square and sight along the other side of the square to a point Q on the ground. If QA = 1' and AB = 5', find AP, the distance across the pond.
