Find all the complex roots. Write the answer in the indicated form.The complex fourth roots of -16 (rectangular form)
A. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
B. 2 + i, 2 - i, -2 + i, -2 - i
C. 1 + i, 1 - i, -1 + i, -1 - i
D. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
Answer: D
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Solve the problem.In a survey of 1000 Americans, 850 said that they own a cell phone. Assume that the survey was properly conducted and that the 1000 people surveyed represent an unbiased sample of the entire population. Compute a 95% confidence interval (expressed using percents) for this survey.
A. 84.8% to 85.2% B. 82.8% to 87.2% C. 84.08% to 85.02% D. 81.7% to 88.3% E. 83.9% to 86.1%
Classify by type (cardinal, ordinal, or nominal) the number that appears in the sentence.The novel has 594 pages.
A. Nominal B. Ordinal C. Cardinal
The function f is one-to-one. Find its inverse.f(x) = 2x + 5
A. f-1(x) = 
B. f(x) = 
C. f-1(x) = 
D. f-1(x) = - 
Solve.The sum of two numbers is 13 and the sum of their squares is 97. Find the numbers.
A. 5 and 8 B. 4 and 9 C. 3 and 10 D. 6 and 7