Evaluate the integral.

A.  sin9x +  sin 7x + C
B.  cos 2x +  cos 16x + C
C.  sin 2x -  sin 16x + C
D.  sin 2x +  sin 16x + C


Answer: D

Mathematics

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Find the length of the parametric curve defined over the given interval.x = 3 cos t, y = 3 sin t, 0 ? t ? ?

A. ? B. 9? C. 6? D. 3?

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Let f  be the function defined by .

?Find , and 


A. ,

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B. ,

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C. ,

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D. ,

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E. ,

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Choose the correct response.What is the speed of a plane that travels at a rate of 503 mph into a wind of r mph?

A. r - 503 mph
B. 503 + r mph
C.  mph
D. 503 - r mph

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Evaluate the expression for x = -2, y = 3, and a = -4.

A.
B.
C. 0
D. 2

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