For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 1tk
A. a = 
N
B. a = 1
T
C. a = 1
N
D. a = T + 1
N
Answer: C
Mathematics
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of her book on Monday, 
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A. 
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