Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set.2x + 2y + z = 152x - 3y - z = 43x + y + 4z = 28
A. {(3, 1, 5)}
B. Cramer's rule does not apply since D = 0; ?
C. {(5, 1, 3)}
D. {(5, 3, 1)}
Answer: C
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The following question(s) refer(s) to the capture-recapture method: n1 denotes the size of the tagged (captured) sample, n2 denotes the size of the second (recaptured) sample, and k denotes the number of tagged individuals in the second sample.If n1 = 250, n2 = 150, and k = 25, an estimate for the size of the population is
A. 2500. B. 1500. C. 3000. D. 15. E. none of these
Use the frequency polygon to answer the following.The frequency polygon shows the salaries of employees of a small company.
The greatest number of employees are in which salary group?
A. $50,000-$60,000 B. $30,000-$35,000 C. $50,000-$55,000
Evaluate the definite integral. 
A. e + e-1
B. 3(e - e-1)
C. e - e-1
D. 
(e - e-1)
Answer the question.In how many ways can you answer the questions on an exam that consists of 13 multiple choice questions, each of which has 4 answer choices?
A. 67,108,634 B. 67,109,704 C. 28,561 D. 67,108,864