Find the curvature of the space curve.r(t) = (t + 2)i + 2j + (ln(sec t) + 8)k
A. ? = cos t
B. ? = sin t
C. ? = csc t
D. ? = sec t
Answer: A
Mathematics
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Write the vector v in the form ai + bj, given its magnitude 
and the angle ? it makes with the positive x-axis.
= 11, ? = 150°
A. v = 11
B. v = 11
C. v = 11
D. v = 11
Mathematics
Solve the quadratic inequality by any method. Write your answer in interval notation.x2 - 11x + 28 < 0
A. (-?, 7) B. (4, 7) C. (-4, 7) D. (0, 7)
Mathematics
Find a number to replace the question mark so that the given fractions are equivalent.
= 
A. 40 B. 10 C. 60 D. 20
Mathematics
Solve the problem. Round to the nearest cent or tenth of a percent.An item has a 39.5% markup based on selling price. What is the equivalent markup percent based on the cost?
A. 28.3% B. 65.3% C. 34.7% D. 71.7%
Mathematics