Find the nth term {an} of the geometric sequence. When given, r is the common ratio.6, 12, 24, 48, 96, ...
A. an = 6 ? 2n
B. an = a1 + 2n
C. an = 6 ? 2n
D. an = 6 ? 2n-1
Answer: D
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Suppose the two "legs" of the compass shown in the illustration are adjusted so that the distance between the pointed ends is 8 inches. What will the area of the circle be, if 
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A. 200.96 B. 50.24 C. 3.1415926536 D. 16 E. none of these
Solve the problem.
Jeffrey Haas earns $4723.08 biweekly, is married, and claims 3 withholding allowances. Find his net earning for this pay period. Social security tax is 6.2% and Medicare tax is 1.45%.
A. $3705.35 B. $4361.77 C. $5018.19 D. $4066.66
Suppose that you toss a coin and roll a die. The sample space is shown in the figure. What is the probability of obtaining heads and a two?
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What will be an ideal response?
Simplify.
A. -2 B. -4 C. 4 D. 2