For the compound inequality, give the solution set in both interval and graph forms.x - 1 > 1 or x + 1 < 2
A. (-?, 1) ? (2, ?)
B. (1, ?)
C. (-?, -1) ? (2, ?)
D. (-?, 2)
Answer: A
Mathematics
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Find the mean.Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. Round your answer to one decimal place if necessary. 55 67 62 54 63 58 60 51 56
A. 57.2 B. 58.4 C. 58.0 D. 57.8
Mathematics
Solve the problem.A radioactive substance has a decay rate of 4.5% per day. What is its half-life?
A. 17.8 days B. 15.4 days C. 3.1 days D. 0.15 days
Mathematics
Find the limit.
(1 - cot x)
A. 0 B. ? C. -? D. Does not exist
Mathematics
Simplify the rate and write the result in words.
A. 
; 150 teachers for every 7 students
B. 
; 150 students for every 7 teachers
C. 
; 150 students for every 49 teachers
D. 
; 1050 students for every 7 teachers
Mathematics