Find the nth term an of the geometric sequence.8, -16, 32, -64, 128, . . .
A. an = (8)(-2)n
B. an = (8)(-2)n-1
C. an = (8)(-2n)
D. an = a1 - 2n
Answer: B
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Find the exact value of the expression.cos2
A. 
B. 
C. 
D. 
Solve the problem.Sketch a graph that depicts the amount of water in a 50-gallon tank during the course of the described pumping operations. The tank is initially full, and then a pump is used to take water out of the tank at a rate of 6 gallons per minute. The pump is turned off after 5 minutes. At that point, the pump is changed to one that will pump water into the tank. The change takes 2 minutes and the water level is unchanged during the switch. Then, water is pumped into the tank at a rate of 3 gallons per minute for 3 minutes.
A. 
B. 
C. 
D. 
Solve the equation by completing the square.x2 + 38 = -14x
A. -14 + 
B. 7 + 
C. -7 - 
, -7 + 
D. 7 - 
, 7 + 
For the given direct statement, write the indicated related statement (converse, inverse, or contrapositive).q ? ~p (inverse)
A. ~q ? p B. p ? ~q C. ~p ? q D. q ? p