Solve the problem.Construct a possibility tree that shows all possible 2-letter code words using only the letters c and d without repetition.
A.
| /\ |
| c | d |
| /\ | /\ |
| c | d | c | d |
B.
| | |
| c |
| | |
| d |
C.
| /\ |
| c | d |
| | | | |
| d | c |
D.
| /\ |
| c | d |
| /| | | |
| c | d | c |
Answer: C
Mathematics
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Find the limit.
cot-1 x
A.
| 0? |
B. ?
C.
D. ?
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Solve the problem.If the rectangle below is a golden rectangle(with 2x as the shorter side), then the approximate value of x is
A. 144. B. 161.8. C. 72. D. 116.5. E. none of these
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