Solve the problem.An airline charter service charges a fare per person of $250 plus $20 for each unsold seat. The airplane holds 200 passengers. Let x represent the number of unsold seats and write an expression for the total revenue R for a charter flight.
A. R(x) = 200(250 + 20x) or 50,000 + 4000x
B. R(x) = (200 - x)(250 + 20x) or 50,000 + 4000x - 20x2
C. R(x) = x(250 + 20x) or 250x + 20x2
D. R(x) = (200 - x)(250 + 20x) or 50,000 + 3750x - 20x2
Answer: D
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