Solve the problem.The output voltage for an a.c. generator is approximated by v = 156 cos (120?t - 
). Find the smallest positive value of t for which the output is 82 volts. (Use 3.1416 as an approximation for 
A. t = 0.0120
B. t = 0.0055
C. t = 0.0045
D. t = 0.0110
Answer: B
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Determine whether the nonincreasing sequence converges or diverges.an = 
A. Converges B. Diverges
Solve the problem.In the "Big Bucks" lottery game, a person is to pick 7 digits from 0 to 9 in correct order. If a number can be repeated, how many ways are there to play a pick?
A. 40,353,607 B. 100,000,000 C. 282,475,249 D. 10,000,000
Determine which purchase has the lower unit price.Brand X: 8 oz. for $2.00Brand Y: 20 oz. for $4.20Brand Z: 24 oz. for $5.28
A. Not enough information B. Brand X C. Brand Z D. Brand Y
Use the discriminant to identify the graph of the non-degenerate conic as a parabola, an ellipse, or a hyperbola.4x2 - 6xy - 3y2 + 11 = 0
A. parabola B. ellipse C. hyperbola