Solve the problem.Peter must practice the piano 13
hours per week. He has already practiced 7
hours. How many more hours does he need to practice?
A. 4
hours
B. 5 hours
C. 6
hours
D. 5
hours
Answer: D
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Give the domain and range of the relation.{(2, 7), (-1, -9), (-6, -4), (6, 0)}
A. domain: {-6, -1, 2, 6}; range: {-9, -4, 0, 7} B. domain: {2, 6, 7}; range: {-9, -6, -4, -1} C. domain: {-9, -6, -4, -1}; range: {2, 6, 7} D. domain: {-9, -4, 0, 7}; range: {-6, -1, 2, 6}
Classify the angle as acute, right, obtuse, or straight.
A. Right B. Straight C. Acute D. Obtuse
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
The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph.
[-5, 5] by [-5, 5]
A. r = 4 + cos ? B. r = 3 + 2 cos ? C. r = 2 + 3 cos ? D. r = 2 + 2 cos ?