Find the exact value of the indicated trigonometric function of ?, if ? is an angle in standard position whose terminal side contains the given point.(9, 12); Find cos ?.
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 12 cm B. 14.5 cm C. 72.5 cm D. 145 cm
Evaluate the function. Round to two decimal places.Evaluate 
when x = 4.
A. 57.88 B. 34.73 C. 23.15 D. 28.94
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
Given that the discriminant of a quadratic equation is -120, describe the solutions.
A. one rational solution B. two rational solutions C. two irrational solutions D. two non-real solutions E. none of these