Use the graph to evaluate the limit.
f(x)
A. -2
B. 2
C. does not exist
D. -1
Answer: A
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Find d2y/dx2 without eliminating the parameter.x = cot t - 3, y = 11 csc t - 2, 0 < t < ?
A. 
B. 11 sin t cos2t
C. 11 sin3t
D. 
Find the indicated term for the geometric sequence with the first term a1 and common ratio r.Find a2 when a1 = 1728, r = 
A. a2 = - 
B. a2 = 432
C. a2 = 
D. a2 = -432
Find the equation in standard form of the parabola described.The focus has coordinates (0, 6), and the equation of the directrix is y = -6.
A. x2 = -24y B. x2 = 24y C. y2 = 6x D. y2 = 24x
Use a proportion to solve the problem.The ratio of the lengths of strings that play the notes D and B is 27 to 16. If a string 64 centimeters long plays a B, what is the length of the string that plays a D?
A. 124 centimeters B. 80 centimeters C. 108 centimeters D. 91 centimeters