Write the rational expression as an equivalent rational expression with the desired denominator.
= 
A. (x + 3)(x + 4)(x + 9)
B. (x + 4)(x + 9)
C. 
D. 
Answer: A
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Find a polar equation for the circle.(x - 4)2 + y2 = 16
A. r = - 8 cos ? B. r = 4 cos ? C. r = 8 cos ? D. r = 8 sin ?
Solve the problem.A dual-beam search light is positioned to shine on a prison wall. The light is 4 feet from the wall and rotates clockwise. The light shines on point P on the wall when first turned on 
After t seconds the distance (in feet) from the beam on the wall to the point P is given by the function 
Find the value for b if the light beam is to sweep the entire wall in 40 seconds. 
A. 
B. 
C. 
D. 
Express the interval in set-builder notation and graph the interval on a number line.
A. 
B. 
C. 
D. {x 
}
Write out the sum.
A. 
B. 
+ 2 + 
+ ... + 
C. 4 + 32 + 108 + ... + 
D. 1 + 2 + 3 + ... + n