Solve for x, in radians, so that x is within the indicated interval. Find the answer to three decimal places. 7 cos2 x + 4 cos x = 0, [0, ?]
A. 1.571, 2.179
B. 0.963, 1.571
C. -1.571, 0.963
D. 0, 2.179
Answer: A
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Use reference angles to find the exact value of the expression. Do not use a calculator.tan 
A. 
B. 
C. -
D. - 
Factor the polynomial completely. If the polynomial cannot be factored, say it is prime.-w2 + 14w - 48
A. (-w + 8)(w + 6) B. -(w - 8)(w - 6) C. -(w + 8)(w + 6) D. Prime
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places.log90.947
A. -0.025 B. 9.504 C. -40.348 D. -0.024