The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 8 + 5 cos tFind the body's acceleration at time t = ?/3 sec.

A.  m/sec2
B. -  m/sec2
C. -  m/sec2
D.  m/sec2

Answer: C

Mathematics

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Use reduction formulas to evaluate the integral.

A. -  sin4 2x cos 2x -  sin2 2x cos 2x -  cos 2x + C
B. -  sin4 2x cos 2x -  sin2 2x cos 2x -  cos 2x + C
C. -  sin4 2x cos 2x -  sin2 2x cos 2x -  sin 4x +  + C
D. -  cos4 2x sin 2x -  cos2 2x sin 2x -  cos 2x + C

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Determine the coordinates of the indicated point on the graph. F

A. (0, 2) B. (2, 1) C. (2, 0) D. (1, 2)

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Factor the difference of squares.2x2 - 72y2

A. 2(x - 6y)2 B. (2x + 6y)(2x - 6y) C. 2(x + 6y)(x - 6y) D. 2(1 + 6xy)(1 - 6xy)

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Find the product.(n + 7)2

A. n + 49 B. n2 + 14n + 49 C. n2 + 49 D. 49n2 + 14n + 49

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