Solve the problem.Use Ohm's Law, I = 
, to find the current I, given voltage 
and impedance 
A. 12(cos 12.0° + i sin 12.0°)
B. 1008(cos 110° + i sin 110°)
C. 12(cos 10° + i sin 10°)
D. 77(cos 10° + i sin 10°)
Answer: C
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Find the x-intercepts of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. x5 - 27x3 + 50x = 0
A. 0, touches the x-axis and turns around;
5, crosses the x-axis;
-5, crosses the x-axis;
, crosses the x-axis;
-
, crosses the x-axis
B. 0, touches the x-axis and turns around;
25, touches the x-axis and turns around;
2, touches the x-axis and turns around
C. 0, crosses the x-axis;
5, crosses the x-axis;
-5, crosses the x-axis;
, crosses the x-axis;
-
, crosses the x-axis
D. 0, crosses the x-axis;
25, touches the x-axis and turns around;
2, touches the x-axis and turns around
Solve the problem.For the given stock investment, find the percentage return:
A. 47.5% B. 186.4% C. 81.8% D. 86.4%
Solve by the substitution method.0.3x + 0.6y = 5.40.4x - 0.1y = 0.9
A. {(7, 4)} B. ? C. {(x, y)| 0.3x + 0.6y = 5.4} D. {(4, 7)}
Solve the inequality.x3 > 3x2
A. (-?, 0) or (3, ?) B. (3, ?) C. (-?, 3) D. (0, 3)