Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, - 6
) and (0, 6
)
vertices at (0, -9), (0, 9)
B. center at (0, 0)
foci at (- 6
, 0) and (6
, 0)
vertices at (-9, 0), (9, 0)
C. center at (0, 0)
foci at (-9, 0) and (9, 0)
vertices at (-81, 0), (81, 0)
D. center at (0, 0)
foci at (0, -3) and (0, 3)
vertices at (0, -9), (0, 9)
Answer: B
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Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(8x - 1)2
A. 64x2 - 16x + 1 B. 8x2 - 16x + 1 C. 64x2 + 1 D. 8x2 + 1
Represent the radical as a radical with a smaller root index. Assume any variables represent nonnegative values.
A. 
B. 
C. 
D. 
Solve the problem.Write parametric equations for the tangent line to the curve of intersection of the surfaces 
and 
at the point 
A. 
B. 
C. 
D. 
Find the velocity vector in terms of ur and u?.r = ea? and 
= 7
A. v = 7ea?ur + 7ea?u? B. v = 7ea?ur + 7aea?u? C. v = 7aea?ur + 7ea?u? D. v = 7aea?ur + 7aea?u?