Solve the problem.If $2000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $4000 at 5%? Round to the nearest tenth.
A. 3.5 years
B. 13.9 years
C. 13.5 years
D. 12.0 years
Answer: B
Mathematics
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Evaluate the sum.
A. 729 B. 2025 C. 285 D. 900
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Graph the circle.x2 + y2 + 2x + 2y - 23 = 0
A. 
B. 
C. 
D. 
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Find the vertex, focus, and directrix of the parabola with the given equation.(x - 1)2 = 20(y - 3)
A. vertex: (-1, -3) focus: (-1, 2) directrix: y = -8 B. vertex: (3, 1) focus: (3, 6) directrix: y = -4 C. vertex: (1, 3) focus: (1, -2) directrix: x = 8 D. vertex: (1, 3) focus: (1, 8) directrix: y = -2
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Find an equation of an ellipse satisfying the given conditions.Foci: (0,-3) and (0, 3) ; length of major axis: 10
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Mathematics