A certain firm's marginal cost, in dollars, for a product is 
, its marginal revenue, in dollars, is 
, and its total cost of production of 8 items is $900. Find the profit or loss at the
optimal level of production. Round your answer to the nearest dollar.
?
A. $172 loss
B. $172 profit
C. $820 profit
D. $820 loss
E. $400 loss
Answer: B
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Determine whether 149,850 is divisible by 6.
A. no B. yes
Perform the indicated operation. Simplify if possible.
- 5x
A. 
B. 
C. 
D. 
Solve the system by the elimination method or a combination of the elimination and substitution methods.5x2 + 3xy - 5y2 = -9 x2 - xy - y2 = -5
A. {(-1, 2), (1, -2), (2i, i), (-2i, -i)}
B. {(-1, -2), (1, 2), (2i, -i), (-2i, i)}
C. 
D. 
Rewrite the expression as a sum or difference of logarithms or multiples of logarithms.log11 
A. 
log11(13) - 2 log11(y) - log11(x)
B. 5 log11(13) - 2 log11(y) - log11(5)
C. log11(13) - log11(y) - log11(x)
D. 
log11(13) - 2 log11(y) - 2 log11(x)