Find the sum.
A. 3,009,831
B. 2453
C. 2455
D. 3,012,285
Answer: D
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Find the interval of convergence of the series.
A. 0 < x < 2 B. -1 < x < 3 C. x < 3 D. -3 < x < 3
Solve the problem.When a particular circuit containing a resistor, an inductor, and a capacitor in series is connected to a battery, the current i (in amperes) is given by i = 23e-3t(e2.6t - e-2.6t) where t is the time (in seconds). Find the time at which the maximum current occurs.
A. 1.5 s B. 0.5 s C. 0.6 s D. 1.4 s
The polar equation of the graph is either r = a + b cos ? or r = a + b sin ?, a > 0, b > 0. Match the graph to one of the equations. 
A. r = 3 + 4 cos ? B. r = 4 + 3 cos ? C. r = 3 + 4 sin ? D. r = 4 + 3 sin ?
Solve the problem.The speed of a vehicle is inversely proportional to the time it takes to travel a fixed distance. If a vehicle travels a fixed distance at 60 miles per hour in 35 minutes, how fast must it travel to cover the same distance in 50 minutes?
A. 
mph
B. 
mph
C. 
mph
D. 42 mph