Calculate the arc length of the indicated portion of the curve r(t).r(t) = 
t3/2i + (5t sin t)j + (5t cos t)k ; -3 ? t ? 6
A. 240
B. 127.5
C. 112.5
D. 180
Answer: C
Mathematics
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Sketch the graph of the function by first making a table of values.
?
?
A. 
B. 
C. 
D. 
E. 
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Evaluate the expression.x - y, where x = -3 and y = -12
A. 9 B. -15 C. -9 D. 15
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