Factor completely.18x4 + 63x3 - 36x2
A. x2(2x - 1)(9x + 36)
B. 9x(2x + 1)(x - 4)
C. 9x2(2x - 1)(x + 4)
D. (18x2 - 9)(x2 + 4)
Answer: C
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Use logarithmic differentiation to find the derivative of y with respect to the independent variable.y = xln x
A. xln x - 1ln x
B. 2xln x - 1ln x
C. 
D. 
2
Online retail sales stood at $22.7 billion for 2000. For the next 2 years, they grew by 32.4% and 27.6% per year, respectively. For the next 6 years, online retail sales are projected to grow at 30.2%, 19.7%, 24.3%, 13.6%, 17.2%, and 10.6% per year, respectively. What are the projected online sales for 2008? Round your answer to one decimal place. ?
A. $113.6 billion B. $112.2 billion C. $110.8 billion D. $108.0 billion E. $109.4 billion
Provide an appropriate response.Adding the minuend and the subtrahend, in a subtraction problem, is one way of proving your answer.
A. True B. False
Solve the problem.The production function z for an industrial country was estimated as 
where x is the amount of labor and y the amount of capital. Find the marginal productivity of capital.
A. 3x5y2 B. 10x4y3 C. 6x5y2 D. 5x4y3