Find all the rational zeros of the function.
?
x3 - 18x2 + 108x - 216
?
A. -6
B. 0, -1
C. 0, 6
D. 6
E. ±6
Answer: D
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Find the flux of the vector field F across the surface S in the indicated direction.F(x, y, z) = xzi + yzj + k , S is the cap cut from the sphere x2 + y2 + z2 = 9 by the plane 
direction is outward
A. 80? B. 40? C. 24? D. - 40?
Divide.
A. 2i B. -2i C. i - 2 D. 2 - i
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 208 ft/sec, and the gorge is 672 ft deep, during what interval can the flare be seen? (h = -16t2 + vot + ho.)
A. 12 < t < 13 B. 0 < t < 6 C. 18 < t < 19 D. 6 < t < 7
Solve the problem.A water tank can be filled in 7 minutes and emptied in 8 minutes. If the drain is accidentally left open when the tank is being filled, how long does it take to fill the tank?
A. 
min
B. 56 min
C. 
min
D. 3
min