Solve the problem.Find the area of the shaded region. Express the answer in teems of ?. 
A. 8? - 16 square units
B. 16 square units
C. 4?- 16 square units
D. 4?- 4 square units
Answer: A
Mathematics
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with x-intercepts ±6; foci at (-3, 0) and (3, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Evaluate the expression.(-4)-1
A. -4
B. - 
C. 
D. 4
Mathematics
Find the exact value of the expression.csc-1
A. 
B. 
C. 
D. - 
Mathematics
Find the slope of the line.y = 6
A. 0
B. 
C. 6
D. -6
Mathematics