Solve. Simplify the answer.Ian walked 
mile to his biology class, 
mile to his art class, 
mile to his calculus class, and then back to his dormitory. If he walked 1 mile altogether, how far did he walk from his calculus class to his dormitory?
A. 
mi
B. 
mi
C. 
mi
D. 
mi
Answer: B
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In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer films in a school of 900 students?
A. About 20 students B. About 162 students C. About 108 students D. About 180 students
Provide an appropriate response.A(n) __________ represents 
of a complete rotation.
Fill in the blank(s) with the appropriate word(s).
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
Find the open interval(s) where the function is changing as requested.Decreasing; f(x) = 
A. (-?, 5), (5, ?) B. (-?, 1), (1, ?) C. (-?, -1) D. none