Find the torsion of the space curve.r(t) = i + 3tj + k

A. ? = -
B. ? =
C. ? =
D. ? =

Answer: C

Mathematics

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Find the sign of the following.cos (? + 180°), given that ? is in the interval (90°, 180°).

A. positive B. negative

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Find the equation of the graphed line.

A. y = - x + 5 B. y = - x - 5 C. y = x - 5 D. y = x + 5

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Find a formula for the expression. Use sigma notation.

A. xⁿy^-1 + x^n-ky^k-1
B. + xⁿy^-1 + x^n-ky^k-1
C. xⁿy^-1 + x^n-ky^k
D. xⁿy^-1 + x^n-ky^k-1

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Solve the problem.A theatre sells two types of tickets to their plays; children's tickets and adult tickets. For today's performance they have sold a total of 1035 tickets. Also, they have sold 4 times as many children's tickets as adult tickets. How many children's tickets have they sold?

A. 835 B. 824 C. 62 D. 828

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Mathematics