What is the consumers' surplus for the demand curve p = 5 - 
at the sales level 
?
A. 200 - 20 ln 60
B. 291
C. 90
D. 320 - 
ln 60
E. none of these
Answer: C
Mathematics
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Determine the limit by sketching an appropriate graph. 
A. Does not exist B. 1 C. 0 D. 3
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Find the domain of the vector-valued function. r(t) = 
i + 
j
A. 
< 3
B. 
? 3
C. t > 3
D. t ? 3
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Add. Combine like terms, and write the answer in descending order.(6y2 - 8) + (-3y2 - 16)
A. 3y2 + 24 B. -18y2 + 128 C. 3y4 - 24 D. 3y2 - 24
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Write the expression as the sum or difference of logarithms.log4 6x7
A. 3(log4 6 + log4 x) B. log4 6 + log4 x7 C. log4 6 + 7 log4 x D. log4 6 - 7 log4 x
Mathematics