Write a chain rule formula for the following derivative.
for w = f(p, q); p = g(x, y), q = h(x, y)
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
D. 
= 
+ 
Answer: D
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Solve the problem.The median weekly incomes of full-time male workers for various age groups are listed in the table below. 
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