Find the standard form of the equation of the ellipse and give the location of its foci.
A. 
+ 
= 1
foci at (-2
, 0) and (2
, 0)
B. 
+ 
= 1
foci at (-9, 0) and (9, 0)
C. 
- 
= 1
foci at (- 2
, 0) and (2
, 0)
D. 
+ 
= 1
foci at (-2
, 0) and (2
, 0)
Answer: D
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Set up the iterated integral for evaluating 
over the given region D. DD is the right circular cylinder whose base is the circle 
in the xy-plane and whose top lies in the plane 
.
A. 
B. 
C. 
D. 
The function s = f(t) gives the position of a body moving on a coordinate line, with s in meters and t in seconds.s = 2t2 + 2t + 4, 0 ? t ? 2Find the body's speed and acceleration at the end of the time interval.
A. 6 m/sec, 2 m/sec2 B. 14 m/sec, 4 m/sec2 C. 10 m/sec, 8 m/sec2 D. 10 m/sec, 4 m/sec2
Divide. Simplify, if necessary.
÷ 
A. 
B. 
C. 
D. 
Factor.xy + 10x - 6y - 60
A. (x - 10)(y + 6) B. (x + 10)(y - 6) C. (y - 10)(x + 6) D. (y + 10)(x - 6)