For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (cosh t)i + (sinh t)j + tk
A. a = (-sinh t)T + N
B. a = (
sinh t)T + N
C. a = (- 
sinh t)T + N
D. a = (sinh t)T + N
Answer: B
Mathematics
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A. 
= 5t4 - 
- 
B. 
= 20t5 + 
+ 
C. 
= 5t3 - 
- 
D. 
= 20t3 + 
+ 
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A. (6, 4), (-8, 32) B. (-6, 28) C. (6, 4), (-10, 36) D. (4, 8), (0, 64)
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The distribution of the math SAT test scores at a local college is approximately Normal (630, 120) .
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