Use logarithmic differentiation to find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.The parabola x2 = -28y is shifted 3 units up and 6 units to the right. Find the focus and directrix of the new parabola.
A. Focus: (-4, 6); Directrix: x = 10 B. Focus: (6, -4); Directrix: y = -10 C. Focus: (6, 10); Directrix: y = 10 D. Focus: (6, -4); Directrix: y = 10
Identify where f is increasing or where f is decreasing, as indicated. Round your answer to two decimal places when appropriate.f(x) = -6x2 + 24x; increasing
A. [-2, ?) B. (-?, 2] C. (-?, -2] D. [2, ?)
Perform the indicated operation. Give answer in standard form.
A. 4 + 4i B. 4 + 5i C. 4 + 10i D. 5 + 5i
Solve.The number of visitors to a tourist attraction (for the first few years after its opening) can be approximated by 
where x represents the number of months after the opening of the attraction. Find the number of visitors 8 months after the opening of the attraction.
A. 58 visitors B. 80 visitors C. 130 visitors D. 53 visitors