Identify the quadrant with the given condition.The coordinates have the same sign.
A. III and IV
B. I and II
C. I and III
D. II and IV
Answer: C
Mathematics
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Find the indicated decile or percentile.The weekly salaries (in dollars) of sixteen government workers are listed below. Find the eighty-first percentile P81. 
A. 720 B. 671 C. 787 D. 699
Mathematics
Find the derivative of y with respect to x, t, or ?, as appropriate.y = ln(ln 9x)
A. 
B. 
C. 
D. 
Mathematics
Use the vertical line test to determine whether the graph represents a function.
A. not a function B. function
Mathematics
Match the following reasons to complete the proof.
m?1 = m?3 ___________________
Mathematics