Find the principal unit normal vector N for the curve r(t).r(t) = (t2 + 3)j + (2t - 4)k
A. N = 
j - 
k
B. N = - 
j + 
k
C. N = 
j - 
k
D. N = - 
j + 
k
Answer: A
Mathematics
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converges, what can be said about 
, where k is an integer greater than 1?
A. The series always converges. B. The series always diverges. C. The series may converge or diverge.
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A. 1625 B. 1705 C. 1726 D. 1615
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Identify the following as an expression or an equation. 
x + 3 = 
x - 3
A. Equation B. Expression
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Sketch the graph of the polar equation.r = 3(1 + 2 sin ?)
A. 
B. 
C. 
D. 
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