Find the length of the indicated portion of the trajectory.r(t) = (2cos t)i + (2sin t)j + 7tk, 0 ? t ? ?/2

A. ?
B. ?
C. ?
D. ?


Answer: C

Mathematics

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A. 58 B. 64 C. 127 D. 63

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Graph the inequality.5x + y ? 1

A.

B.

C.

D.

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Solve the problem.The square of the difference between a number and 4 is 36. Find the number(s).

A. 10, 22 B. 10 C. -2, 10 D. 52

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Solve the equation. = 8

A.
B. {64}
C. {8}
D. ?

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