Find an equation for the ellipse described.Foci at (0, ±4); y-intercepts are ±7
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: B
Mathematics
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 9x, y = - 
, x = 1
A. 
?
B. 
?
C. 
?
D. 82?
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Find the perimeter of the composite figure. Use 3.14 as an approximation for ?.
A. 38.6 m B. 51.1 m C. 59.1 m D. 46.6 m
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Determine whether the triangles in the given pair are congruent. If so, state the property that shows the triangles are congruent.
A. congruent; ASA B. congruent; AAS C. not congruent D. congruent; AAA
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Use a coterminal angle to find the exact value of the expression. Do not use a calculator.sin 
A. - 
B. 
C. - 
D. 
Mathematics