Calculate the flow in the field F along the path C.F = 5i + 8j + 7k; C is the curve r(t) = 8 cos 8ti + 8 sin 8tj + 3tk , 0 ? t ? 
?
A. 208 + 126?
B. 
?
C. 48 + 126?
D. 80 + 126?
Answer: B
Mathematics
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Evaluate the factorial expression.
A. 4
B. 4!
C. 1
D. 
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Give all solutions of the nonlinear system of equations, including those with nonreal complex components. 2x2 + xy + 2y2 = 23x2 - 5xy + 3y2 = 3
A. {(1, 0), (-1, 0)} B. {(1, 0), (-1, 0), (0, 1), (0, -1)} C. {(1, 0), (0, 1)} D. {(1, 0)}
Mathematics
Solve.Find the hydrogen ion concentration of a solution whose pH is 6.2. Use the formula 
A. 0.79239169 B. 1.58 × 106 C. -0.7923917 D. 6.31 × 10-7
Mathematics
Answer the question.Which of the following statements are true?I: A polytope is the affine hull of a finite set of points.II: An extreme point of a polytope P is any point in the convex hull of 2 vertices.
A. I B. Both I and II C. Neither I or II D. II
Mathematics