Find all the first order partial derivatives for the following function.f(x, y) = ln yx
A. 
= xln y; 
= - 
B. 
= 0; 
= - 
C. 
= ln y; 
= - xln y
D. 
= ln y; 
= 
Answer: D
Mathematics
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Simplify the expression. Write your answer without negative exponents. Whenever an exponent is negative or zero, assume that the base is not zero.
4
A. 
B. 
C. 
D. 
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Find the matrix product when possible.
A. 
B. 
C. 
D. 
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Solve the problem. Express your answer in scientific notation, and round to one decimal place. The national debt of a small country is $7,370,000,000 and the population is 2,662,000. What is the amount of debt per person?
A. $2.8 × 106 B. $2.8 C. $28 D. $2.8 × 103
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