Suppose it has been determined that the sales at Ewing Gallery decline after the end of an advertising campaign, with daily sales given by 
, where S is in dollars and x is the number of days after the campaign ends. What are the daily sales 8 days after the end of the campaign?
?
A. $2,284
B. $143.75
C. $575
D. $287.5
E. $143.75
Answer: C
Mathematics
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