Solve the problem.George Higgendorf sells used books. He had start-up costs of $2800 and pays $2.75 for each book. He sells each book for $5.00. Express the revenue R as a function of x, where x represents the number of books sold.
A. R(x) = 2800x
B. R(x) = 7.75x
C. R(x) = 2.75x
D. R(x) = 5.00x
Answer: D
Mathematics
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