Find the torsion of the space curve.r(t) = (cosh t)i + tj + (sinh t)k
A. ? = - 
B. ? = - 
C. ? = 
D. ? = 0
Answer: B
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Graph the equation.
?
?
A. ?
B. ?
C. ?
D. ?
Use graphing calculator to find the inverse of the matrix. Give 5 decimal places.A = 
A. 
B. 
C. 
D. 
Determine the quadrant(s) in which (x, y) is located so that the condition is satisfied. x = 2 and y < -8
A. quadrant II B. quadrant IV C. quadrants I and IV D. quadrants II and IV E. quadrants III and IV
The total weekly sales for a newly released portable media player (PMP) increased each week. At the same time, the total weekly sales for another newly released PMP decreased each week. Models that approximate the total weekly sales S (in thousands of units) for each PMP are
?
?
where x represents the number of weeks each PMP was in stores, with x = 0 corresponding to the PMP sales on the day each PMP was first released in stores. After how many weeks will the sales for the two PMPs be equal?
?
A. 11 weeks
B. 9 weeks
C. 7 weeks
D. 3 weeks
E. 5 weeks