Find the value of d2y/dx2 at the point defined by the given value of t.x = sin t, y = 7 sin t, t = 
A. 14
B. -14
C. 0
D. -7
Answer: C
Mathematics
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Use the unit circle to determine the value of the given expression or state that it is undefined.tan 
A. 0 B. undefined C. 1 D. -1
Mathematics
In which of the following countries or regions is the emphasis on saving the environment the STRONGEST?
A. Latin America B. Russia C. Europe D. United States
Mathematics
Factor out the greatest common factor with a negative coefficient.-27a2bc - 21ab + 27b2c + 3abc
A. -3ab(9ac - 7 + 9bc + c) B. -3b(9a2c - 7a + 9bc + ac) C. -3ab(9ac + 7 - 9bc - c) D. -3b(9a2c + 7a - 9bc - ac)
Mathematics
Express the verbal representation for the function f graphically.Multiply the input x by 3 and then subtract 4 to obtain the output y.
A. 
B. 
C. 
D. 
Mathematics