Solve by extracting square roots.x2 = -25
A. {± 25i}
B. {± i}
C. {± 5}
D. {± 5i}
Answer: D
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Write the complex number in polar form.9 + 12j
A. 15(cos 233.1° + j sin 233.1°) B. 15(cos 306.9° + j sin 306.9°) C. 15(cos 53.1° + j sin 53.1°) D. 15(cos 126.9° + j sin 126.9°)
Evaluate the expression.3-2
A. -9
B. 9
C. 
D. 
Solve the problem.Find a polynomial that represents the volume of the cube.
A. 27x3 + 27 B. 27x3 + 243x + 27 C. 54x2 + 108x + 54 D. 27x3 + 81x2 + 81x + 27
Use Bayes' rule to find the indicated probability.Quality Motors has three plants. Plant 1 produces 35% of the car output, plant 2 produces 20% and plant 3 produces the remaining 45%. One percent of the output of plant 1 is defective, 1.8% of the output of plant 2 is defective and 2% of the output of plant 3 is defective. The annual total production of Quality Motors is 1,000,000 cars. A car chosen at random from the annual output and is found defection. What is the probability that it came from plant 2?
A. 0.35 B. 0.559 C. 0.224 D. 0.217